Question

The adjacent angles of a parallelogram are (7x -20)0 & (6x+18)0. (3)

Find the measure of all angles of the parallelogram.​

Answer 1

Answer:

We know sum of adjacent angles = 180

So, 7x - 20 + 6x + 18 = 180

13x = 182

x = 14

So angles are 7x - 20 = 7 × 14 - 20 = 78

other angle is 6x + 18 = 14 × 6 + 18 = 84 + 18 = 102

Hence, angles are 78, 102, 78, 102.