Answer and explanation:
5. 52° because angles in a triangle add to 180° (90 + 38 = 128, 180 - 128 = 52)
6. 128° because angles on a straight line add to 180° (180 - 52 = 128)
7. 52° because vertically opposite angles are equal (equal to angle 5)
8. 128° because vertically opposite angles are equal (equal to angle 6)
9. 52° because co-interior angles (C angles) add to 180° (180 - 52 = 128)
10. 38° because complementary angles (angles in a right angle) add up to 90° (90 - 52 = 38)
The picture attached is a co-interior angle:
