Question

4. List two pairs of adjacent angles.

5. List all pairs of vertical angles.
6. If angle1 and angle3 are the same measure, what is the value of x?

Answer 1

4. Angle 1 and Angle 2, Angle 3 and Angle 4. (Or any two angles that share a common vertex and a common side)

5. Angle 1 and Angle 3. (Only pair, both angles are 90°)

6. 9x=90

9x/9=90/9

x=10