In this lesson our instructor talks about isosceles and equilateral triangles. She discusses the isosceles triangle theorem and its converse. Then, she talks about the equilateral triangle theorem corollaries. Four complete extra example videos round up this lesson.
Isosceles Triangle Theorem: If two sides of a triangle are congruent, then the angles opposite those sides are congruent
Isosceles Triangle Theorem Converse: If two angles of a triangle are congruent, then the sides opposite those angles are congruent
Isosceles Triangle Corollaries:
A triangle is equilateral if
and only if it is equiangular
Each angle of an equilateral
triangle measures 60 degrees
Isosceles and Equilateral Triangles
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.