|
Unlimited Tutoring & Homework Help
|
|
Introduction
Triangles are classified on the basis of the lengths of their sides as scalene, isosceles, or equilateral triangles. When any two sides of a triangle are equal it is called as an "isosceles triangle". The unequal side is called its base and the angle opposite the base is called the "vertical angle".
Theorem
If two sides of a triangle are equal, the angles opposite to them are equal.
Theorem 2(converse of Theorem 1)
If two angles of a triangle are equal, the sides opposite to these angles are equal.
Summary
If two sides of a triangle are equal, the angles opposite to them are equal.
