Answer:
8) complementary, 45°
9) supplementary, 5x = 135°, (x+18) = 45°
10) alternate angles, 49°
Step-by-step explanation:
For 8th question
35 + 5x = 90° because the given angles are complementary
5x = 90 - 35
5x = 45
x = 9
For 9th question
5x + x + 18 = 180° because the given angles are supplementary
6x = 180 - 18
6x = 162
x = 27
For 10th question
3x + 1 = 49° because these angles are alternate
3x = 49 - 1
3x = 48
x = 16
