1. 7.G.5 ~ Find measures of angles formed by intersecting lines

2. When two lines intersect, they form a 360º angle, or a circle.

3. Half of a circle is a straight line, or 180º.

4. When two lines intersect, they form two pairs of opposite angles, A + C and B + D. Another word for opposite angles are vertical angles. Vertical angles are always EQUAL!

5. Adjacent angles are angles that come out of the same vertex. Adjacent angles share a common ray and do not overlap.

6. Two angles are said to be complementary when the sum of the two angles is 90°.

7. Two angles are said to be supplementary when the sum of the two angles is 180°, or form a straight line.

8. Find the value of x. Then find the value of each angle. 56° 84°

9. Find the value of y. y = 9

10. Find the value of x. Then find the value of each angle. X=30 33° 57°

11. Find the value of x. Then find the value of each angle. X = 17 67° 113°

12. Find the missing angles: 40° 58° 90° 50°

13. Now, let’s do some practice with angles!