Math Chapter 5

Triangle Sum Theorem

The sum of the measures of the angles of a triangle is 180.

Corollary (rough know)

Easily provable statement based on a specific theorem

Corollary to the Triangle Sum Theorem

The acute angles of a right triangle are complementary

Third Angles Theorem

If two angles of one triangle are congruent to two angles of another triangle, the third angles are also congruent

Exterior Angle Theorem

The measure of an exterior angle of a triangle equals the sum of the measure of the two nonadjacent interior angles.

Congruent Triangles Definition (rough know)

Same size and shape

Isosceles Triangle Theorem

If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

Isosceles Triangle Converse Theorem

If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

CPCTC (rough know) Whats it used for up until?

Corresponding Parts of congruent triangles are congruent // Finding congruent segments