Angle & Segment Proofs

If a = b and b = c, then a = c.

A midpoint divides a segment into two equal parts.

If point B is between points A and C, then AB + BC = AC.

Vertical angles are the angles opposite each other when two lines cross. They are always congruent.

Two angles are complementary if the sum of their measures is 90 degrees.

A linear pair consists of two adjacent angles whose non-common sides form a straight line.

If a = b, then a + c = b + c for any c.

Two figures are congruent if they have the same shape and size.

To bisect means to divide something into two equal parts.

Two angles are supplementary if the sum of their measures is 180 degrees.