9-2 Angle Relationships and Parallel Lines – We learned how to define an angle and its parts. We learned that we can name an angle by a single letter, a number at its vertex, or by three letters that name points on the angle. The middle letter must be the vertex and the other two letters must name a point on each of the two rays. Next we learned that when the sum of two angles is 180°, the angles are supplementary. When the sum of two angles is 90°, the angles are complementary.
Assignment: Complete problems from 9-2 in workbook