1. Angle Review

2. Angles with the same measure are congruent.
If m1 = m2, then 1  2
Congruent
“curtains”

3. Vertical Angles
Vertical angles are two nonadjacent angles formed by two intersecting lines
Vertical angles are ALWAYS congruent 4 3 1 2
Angles 1 and 3 are vertical;
Angles 2 and 4 are vertical.

4. Complementary Angles
Complementary angles are 2 angles whose measures have a sum of 90 degrees
Complementary angles can be adjacent or nonadjacent
200
700

5. Supplementary Angles
Supplementary angles are 2 angles whose measures have a sum of 180 degrees.
Supplementary angles can be adjacent or nonadjacent.
520
1280

6. Angles One big and one small equal 180 “small” angles are equal
“big” angles are equal
One big and one small equal 180