Question

what are all the theorems for triangles.

Answer 1

Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180° base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

Answer 2

there are many theorems in triangles.

thales theorem :-

if two triangles are similar , then ratio of corresponding sides are equal.

boudhayan or pythagora theorem :-

in a right anled triangle , sum of squares two sides of triangles is equal to hypotenuse.

there are congruence and similarities theorems like sss , sas , asa ,rhs etc.