Question

7. In the parallelogram ABCD, angle A = 3xº, and
angle B = (5x + 12). Find the value of x and the
measures of all the angles of the parallelogram​

Answer 1

Answer:

63, 117, 63, 117

Step-by-step explanation:

3x + (5x+12) = 180°. (Sum of adjacent sides of a parallelogram 180°)

8x + 12 = 180°

x = 21

Angle A = 3 × 21 = 63

Angle B = 5 × 21 + 12 = 117