Exterior Angle Theorem For Triangles, Practice Problems - Geometry

This geometry video tutorial provides a basic introduction into the exterior angle theorem for triangles. It explains how to use it solve for x and y. It describes the difference between interior angles and exterior angles as well as the remote interior angles. It contains plenty of examples and practice problems.
Triangle Congruence - SSS, SAS, ASA:
• Triangle Congruence Th...
CPCTC - 2 Column Proofs With Triangles:
• CPCTC Geometry Proofs ...
Hypotenuse Leg Theorem - HL Postulate:
• Hypotenuse Leg Theorem...
Detour Proofs - Double Triangle Congruence:
• Detour Proofs - Double...
The Midpoint Formula:
• Midpoint Formula
_________________________________
Missing Diagrams - 2 Column Proofs:
• Missing Diagrams With ...
Right Angle Theorem - SSS & SAS:
• Right Angle Theorem - ...
Perpendicular Bisector Theorem:
• Perpendicular Bisector...
Altitude, Median, Midpoint & P. Bisector:
• Altitudes, Medians, Mi...
Parallel & Perpendicular Lines - Slope:
• Finding The Slope Give...
__________________________________
Indirect Proofs - Example Problems:
• Indirect Proofs, Pract...
Proving Parallel Lines With Proofs:
• Proving Parallel Lines...
Exterior Angle Inequality Theorem:
• Exterior Angle Inequal...
Polygons:
• Polygons
_______________________________________
Final Exams and Video Playlists:
www.video-tutor.net/
Full-Length Videos and Worksheets:
/ collections

[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/
Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections

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I never noticed that two of the angles make alternate interior angles. Thanks.

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what if there is 1 remote angle pls reply

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Is there a way to calculate the measurements of the two remote interior angles using the exterior angle ? I really think that would be pretty cool

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[@triple_gem_shining]

you can also do it the long way, all triangle sum of angles is 180.. then find that 3rd angle is 80.. every straight line is angle 180.. then minues angle 3 from 180.. giving 100degrees for exterior.