Equilateral triangle sides and angles congruent | Congruence | Geometry | Khan Academy

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  • Опубликовано: 23 окт 2024

Комментарии • 14

  • @matthiasvk555
    @matthiasvk555 12 лет назад +4

    @carlitosvodka
    'congruent' is a math word. It means 'the same'
    For example,
    all 3 sides are congruent
    all 3 sides are the same (have the same length)

  • @mohanreddy3702
    @mohanreddy3702 8 лет назад +7

    the base of an equilateral triangle is x + y - 2 = 0 and the opposite vertex is (2, -1) find the equation of the remaining sides

    • @skylerpretto1221
      @skylerpretto1221 3 года назад +1

      The line given by you has slope-intercept form of y = 2 - x
      If the point (2,-1) you provided is to be the opposite vertex, that would imply that a perpendicular bisector can be drawn through that point and have a slope equal to the negative reciprocal of the line you provided, namely using point-slope, resulting in: y_bisector = x - 3
      The perpendicular bisector also bisects the 60deg angle of the vertex.
      Notice that the equation of the perpendicular bisector can be expressed as: y_bisector = -1 + [tan(45)]*(x - 2)
      Now, we rotate the perpendicular bisector by +/- 30deg about the point (2,-1) to attain the equations you have requested, namely:
      y1 = -1 + [tan(75)]*(x - 2)
      y2 = -1 + [tan(15)]*(x - 2)

  • @teddy_yushivansh1800
    @teddy_yushivansh1800 4 года назад +1

    Good

  • @fantasticsammi5583
    @fantasticsammi5583 8 лет назад +2

    Fantastic 😄😆😉

  • @Manishsingh-jr9ze
    @Manishsingh-jr9ze 3 года назад

    Thanks ❤️

  • @Fullautozombies
    @Fullautozombies 9 лет назад +3

    How do you show the area and perimeter of a triangle as a function of the triangles side lenght? Ive been looking for the answer to this everywhere and I cant find it. Its not in the book (has a search function) but its on the homework and the teacher is absolutely useless.

  • @carlitosvodka
    @carlitosvodka 13 лет назад +2

    what is congruent?

    • @victorpico3169
      @victorpico3169 7 лет назад +7

      Ralph Piñon bruh.

    • @omairqazi9349
      @omairqazi9349 6 лет назад +2

      If two triangles have same sides.. We can say these are congruent.. Mean same, equivalent

    • @jerfersonmatos28
      @jerfersonmatos28 6 лет назад +6

      Omair Qazi do you think that after 6 years he still needs the answer? 😂

    • @devangib3968
      @devangib3968 6 лет назад +1

      Jerferson de Matos LOL..

    • @artworks2153
      @artworks2153 3 года назад

      @@jerfersonmatos28 lol HAHAHA