US Common Core State Standard Math HSG-CO.C.10

Demonstrations 1 - 15 of 15

Description of Standard: 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*.