I saw ur videos bcoz of colourful presentation ❤️✨ it's attract me more towards study and this also remind my childhood days 🥺💕 when I was used to study this types of colourful books 💗👀✨ Understood perfectly it took me so much time but after ur videos it's easy for me now .. thankyou sir ✨
Great explanation sir!!!!!!!! I hv understood each n every step very easily ......... tomorrow is my maths exam n I can solve this question if it will come ........🙏 Thank u so much sir for your fantastic explanation 🙏😇
Sir , I have a question can u make a video on this and the question is - what is the lateral surface area of all 4 pillars of height of each pillar is 14 m and base radius is 1.4 m
@@INCAGERS Just calculate the curved surface area. Lateral surface area of an object is the surface area of the sides. Only top and bottom are not considered.
Sir can’t we directly solve this question when we know that COD is an equilateral triangle? Angle COD will be 60 and it’s opposite angle, i.e CED, will add to 180. So CED + COD = 180 = CED + 60 = 180 = So CED = 120 Degree
That only happens when the quadrilateral is a parallelogram or a cyclic quadrilateral. And that's why the answer is also wrong, it should be proved 60degree not 120
Sir I have doubt that can we solve by exterior angle property ? Because if we add two adjacent angle it will come 120 degree then in triangle CED angle come 60 . 180-120 = 60 and same as other two sides so so , 60 , 60 degree then angle sum property then 180 = 60+ 60 + angle E then 180-120 = 60. Therefore angle E = 60 hence proved
Consider this example - there are two twins, they have equal age, equal height but still they are two different people. We normally do not say a person is equal to other person. The values of their properties are equal. So for all such geometric shapes that have equal magnitude of their properties are called congruent. Hope this is clear now.
Another point I should have mentioned - equal term hum use karte hain for magnitude (like numbers). Shapes ke liye hum congruent use karte hain which means equal in shape and size. Let me know if you still have any doubt.
Sir actually I don't understand when you write angle OCD congruent to angle ODC congruent to angle COD =60 why you write the congruent instead of equal to. My big confusion?
Equal is used to compare the magnitudes. For shapes and angles the term used is congruence. In general we use equal and congruence alternately but that is not right in terms of geometry. I always quoted this example, consider two twins with equal height - Their height is equal but we should not say twins are equal. Another way to understand it is - CPCTC - means Corresponding Parts of Congruent Triangles are Congruent (not equal). That means the sides and angles are congruent. When we say two angles are congruent that means the measure of angles is equal but those could be two different angles. Similarly congruent shapes means they have equal length of corresponding sides and equal magnitude of corresponding angles. But it is generally ok when we say or use EQUAL for shapes and angles. Hope this helps.
You can navigate through all class 9 videos through my website as well - mathemafia.com/. It will be easier for you to find and view all videos that I have created till date (almost).
ACE is a straight line. It is already given in the statement. AC and BD are extended and meet each other at point E. Read the statement once again, you will get it.
@@Mathemafia Thanks How fast you replied I was also thinking of that, so I am thinking of 2 conditions (1)If Lines are extended by construction then they are straight. (2) If lines are extended and intersect at any point they both line are straight but not parallel to each other. Am I right sir Or wrong❌ By the way thanks for your reply
@@lakshya__gupta If two line segments are extended and they intersect each other at one point, they will never be parallel. Parallel lines never intersect each other - just like railway lines. And if two lines coincide, then they will intersect at infinitely many points. Or in other words you say that both are actually the same line. Is it clear now?
Thank you. Regarding use of paper - It looks too much but it is just a piece of paper. I even use very small piece of paper left unused. It looks too much but it is not. :)
I saw ur videos bcoz of colourful presentation ❤️✨ it's attract me more towards study and this also remind my childhood days 🥺💕 when I was used to study this types of colourful books 💗👀✨
Understood perfectly it took me so much time but after ur videos it's easy for me now .. thankyou sir ✨
Life is full of colors, so should be the education. I am glad you liked my tutorial and it helped you as well. Thanks for watching.
The way he says “keep watching... mathemafia” is so wholesome 🤧🤧
Its amazing how neat that work is . My maths paper looks like a trash can
LMAO 😂
Ur paper is trash it needs trash can
@@aryan_mhaske-9194 damn
@@aryan_mhaske-9194 isn't it seems like she/he is his teacher.....😂😂😂
🤣🤣🤣
Watch complete chapter here: ruclips.net/video/7vujAsiNvIA/видео.html
The same way is also in ncert but you explained so well sir that ncert lacks.
Glad you liked it.
I found on RUclips but i not understanding from any video. But from your video. I will understanded thanks ❤😊
Great explanation sir!!!!!!!! I hv understood each n every step very easily ......... tomorrow is my maths exam n I can solve this question if it will come ........🙏 Thank u so much sir for your fantastic explanation 🙏😇
I am so glad to know that. Good luck for your exam. 👍
This channel should have millions of subscribers
Sir , I have a question can u make a video on this and the question is - what is the lateral surface area of all 4 pillars of height of each pillar is 14 m and base radius is 1.4 m
Sir please tell
@@INCAGERS Just calculate the curved surface area. Lateral surface area of an object is the surface area of the sides. Only top and bottom are not considered.
@@Mathemafia sir kya aap iska answer bta skte h plsss
@@Mathemafia sir kya aap iska answer bta skte h plsss
Thank you sir it helped a lot. I was trying to understand this example for soo long. I understood it now
I am so glad that my video helped you. Keep watching.
Sir , but angle COD and angle CBD are on same segment , so how can we take it as 5:20
Your thumbnail was attracted me 😂..... Then only I understand that this vdo is going to be awesome
Glad to hear that 👍
😂 lol
Sir can’t we directly solve this question when we know that COD is an equilateral triangle? Angle COD will be 60 and it’s opposite angle, i.e CED, will add to 180.
So CED + COD = 180
= CED + 60 = 180
= So CED = 120 Degree
That only happens when the quadrilateral is a parallelogram or a cyclic quadrilateral. And that's why the answer is also wrong, it should be proved 60degree not 120
@@pradeepmandal5547 ohhh ok Thank you so much 😀
Over powered explaination sir 🤌
Share it pls. :)
@@Mathemafia for sure sir
Very well explained
Thank you 🙏
Sir very attractive explanation😃
Really amazing explanation
Keep it up👍
Thank you. 🙏
Right
Thank u so much Sir...ur way of explanation is really great..
Awesome explanation better than my teacher and other youtubers , thank you sir for your effort, your teaching was really colorful ☺😊
Glad to know that you like my teaching. 👍
Much better as i expected🤩🤩😚
I am glad you liked it. 🙏
it was an amazing video and the best explnation ....thx alot sirr amzing
Thanks and welcome
Well explained 👍
🙏
His table is better than my future ;)
Feels like im blessed by god that i am being able to see the type of insane content on youtube thank you sir! Appreciate your efforts ❤
Khatarnak explaination difficult question ko easy bana diya
👍
very neat presentation. well done bro
My pleasure
Thank you sir helped a lot … wasted s lot of time behind this but you taught it better than my teacher 👍🏻✨
You are most welcome
Thankuuu so muchh sirrr!!
Sir I have doubt that can we solve by exterior angle property ? Because if we add two adjacent angle it will come 120 degree then in triangle CED angle come 60 . 180-120 = 60 and same as other two sides so so , 60 , 60 degree then angle sum property then 180 = 60+ 60 + angle E then 180-120 = 60. Therefore angle E = 60 hence proved
Which exterior angle are your talking about? Please mention the exact angle then I will be able to answer.
Thanks a lot sir💖💖💖💖
Wc
Very helpful video🎉
Please share it 🙃
Well explained. Thank you sir! But at last that Mathemafia.....was hilarious.....but no probs...gud innivation sir!! Thanks a lot...
I am glad you liked it. 👍
Sir I would like to ask a question with you
Sir, Do you get wages by you tube as
May you tell average😊
I think it is the hardest question but when I came here I understand this question easily. Thank u sir
Happy to know that.
Thanks sir 4 replying me . ☺
@@topperssection9672 I try to respond and solve every query asked. 🙏
@@Mathemafia okk sir. But sir can u plz tell the meaning of Mathemafia
@@topperssection9672 it is a word in german language meaning mafia of mathematics in a good sense.
Excellent way of teaching, actually it was difficult to understand how that angle became 30 degree.
Nobody was explaining it perfectly
My pleasure
@@Mathemafia Sir , it is very important to mention each part of maths because all students are not of same level in studies
sir can we use theorem 10.9 instead of 10.8
What a explanation sir
Just amazing 🤩
i like ur vid very much
Thank you
Sir mujhe angle cod or cbd mein bhut confusion h please reply tomorrow is my final exam
What is the confusion?
@@Mathemafia sir, konse triangle mein th.9.7 use krni h
On both the triangles, combined. Angle COD is twice the angle CBD.
Best of luck for your exam.
@@Mathemafia thanks sir u r world best teacher
Thank you sir for solving my doubt
sir can u explain example-4 of this chapter. your explain very nice
please
It is already there. Here is its link on my website. www.mathemafia.com/class-9-chapter-10-circles-example-4/
And its my pleasure that you like my way of teaching. 🙏
Sir... U explained it so nicely...
👍
Thankyou so much sir for the explanation it was really helpful 🙏✨
Glad you liked it.
My doubts are clear thank you sir
WC
Sir you are superb teacher
Thank you
Sir jo aap congruent bol rhe the video me uska matlb equal hai na
Consider this example - there are two twins, they have equal age, equal height but still they are two different people. We normally do not say a person is equal to other person. The values of their properties are equal. So for all such geometric shapes that have equal magnitude of their properties are called congruent. Hope this is clear now.
Another point I should have mentioned - equal term hum use karte hain for magnitude (like numbers). Shapes ke liye hum congruent use karte hain which means equal in shape and size. Let me know if you still have any doubt.
Nicely explained.
🙏
Sir angle cod = CBD bhi hona chahiye na kyunki angles in the same segment?
No.
Thank you very much sir
Very well explained 👍
Glad you liked it
Thank you Sir!
Wc.
Mastttttttt!!!!!!!!!!!!!!!!!!!!!?😎😎😎🤩🤩🤩🤩
sir your explination is amazing
Thank you 🙏
Thnx a lot sir for such an easy explanation 😊 ☺
Welcome
Genius teacher👌
🙏
Nice explanation
Thanks for liking
Sir you are awsome
👍
Thank u so much sir
Welcome
Thankyou sir
thnkx sir
Wc
Best teacher ever keep teaching sir👏
very great explanation
Tq
Well explained
👍
YOU EXPLAINED SO WELL!!!!!!!!!!!!
👍
Sir please tell that how CBD=30 degree. I didn't get it... I studied 10.8 theorem but unable to understand it..
Watch the video from 3:45 t0 5:00. You will get it. Try watching it a couple of times.
If still you do not get it, I will try to explain.
Oh - you did not get 10.8???? Ask me your concern on that theorem on 10.8 video. I will explain.
Let me know where you could not get that.
The last mathemafia feels so cringey idk but no hate .. you're an amazing teacher ❤❤
Very easy explanation
I am glad you liked it.
thanks for explaining sir
Wc
Perfectly explained. Keep it up ❤️❤️
Sir your way of teaching is amazing but you have less subscriber 🤧
That is what I am trying to address. Sharing helps a lot. Pls share with your friends. I will really appreciate that. 🙏👍
@@Mathemafia I will surely share for ur hardword 🙂
Sir 4:44 me angle half keso ho jaynga please tell samaj nai aya
Watch this theorem to understand the logic used here.
ruclips.net/video/uukTETvh070/видео.html
Thnx sir
wc
Sir agar CD equal na diya ho radius ke to kaise prove karenge
Then the question must have something else to prove or something else should be given. :) It will be eventually a different question. :)
In the question angle COD is given and we have to find angle CED ......
But now it is solved 😊
app ke subscriber 1 year me bas 10 k ha but you expline nice
😐 Yeah I know the count is too low. Jaisi prabhu ki ichcha.
Tx brotha
Wc
Nice sir.. 👌👌💐
Tq
Thanks sir
wc
Boht hard 😉❣️🤗
Thanks you
Well explained but it is treaky lil bit
👍
I am you 884 subdcriber
👍👍👍
Thanku soo much
WC 👍
Sir actually I don't understand when you write angle OCD congruent to angle ODC congruent to angle COD =60 why you write the congruent instead of equal to. My big confusion?
Is your confusion about "equal to" and "congruence" ?
@@Mathemafia yes sir.
Equal is used to compare the magnitudes. For shapes and angles the term used is congruence. In general we use equal and congruence alternately but that is not right in terms of geometry. I always quoted this example, consider two twins with equal height - Their height is equal but we should not say twins are equal. Another way to understand it is - CPCTC - means Corresponding Parts of Congruent Triangles are Congruent (not equal). That means the sides and angles are congruent. When we say two angles are congruent that means the measure of angles is equal but those could be two different angles. Similarly congruent shapes means they have equal length of corresponding sides and equal magnitude of corresponding angles. But it is generally ok when we say or use EQUAL for shapes and angles. Hope this helps.
@@Mathemafia ok thank you so much sir.🙂
You can navigate through all class 9 videos through my website as well - mathemafia.com/. It will be easier for you to find and view all videos that I have created till date (almost).
Can anyone help me 6:57 How we get to know that this line is straight line i.e. AE
ACE is a straight line. It is already given in the statement. AC and BD are extended and meet each other at point E. Read the statement once again, you will get it.
@@Mathemafia Thanks How fast you replied I was also thinking of that, so I am thinking of 2 conditions (1)If Lines are extended by construction then they are straight. (2) If lines are extended and intersect at any point they both line are straight but not parallel to each other. Am I right sir Or wrong❌
By the way thanks for your reply
@@lakshya__gupta If two line segments are extended and they intersect each other at one point, they will never be parallel. Parallel lines never intersect each other - just like railway lines. And if two lines coincide, then they will intersect at infinitely many points. Or in other words you say that both are actually the same line. Is it clear now?
@@Mathemafia yaaaa sir thanks very much no one reply easily but you replied after 1 year thanks sir my query solved
@@lakshya__gupta Good to know that.
Tnku so much sir🥰🥰🥰🥰🥰🥰🥰
Wc
Amazingly explained thanks sir but don't you use a lot of paper😅
Thank you. Regarding use of paper - It looks too much but it is just a piece of paper. I even use very small piece of paper left unused. It looks too much but it is not. :)
@@Mathemafia okk sir you are doing a nice work 👍
Thankuuuuuuuuu
Wc
Best👍
Lovely ✌️♥️
👍
Sir it's just clear explanation from your side..✨ Nd when you said mathsmafia it's shawsome 😄
Thank you.
Sir how
It is same angle that we are talking about. ACE is a straight line. So
@@Mathemafia Thankyou Sir..🙏 for the reply.
@@Mathemafia doubt is clear now.
1k soon
🙏
🙏
Best 💪💪
Thank you
Damn!@#$% For what f*cking reason, this channel is so underrated?
God damn it!
I agree but atleast dont abuse on an educational channel.
👍
👍👌
Nice
👍
Thnx🌚🌚
wc
No better exlanation😢
Thank you. Please share it 🙂
Sir triangle Abe me angle sum property nahi lga sakte
Sir that is oc = od=cd not congruent
Pls always mention the time so that I can quickly have look.
The length of all these three are already given to be equal, means these are congruent. Or you can simply say these are equal.
Alternate la dena sare likal jay ge kyu diamak karabb karana
Do you mean alternate interior angles? If yes, where will you apply it? There are no parallel lines in this question.
Sir aap joh padate h woh samaj nhi aata h 7:16
Explanation is very good but the ending is very bad 😢😢
👍