Question

find the value of x in this figure please

Answer 1

Answer:

2x + 15 + 3x + 30 = 180°

5x + 45 = 180

5x = 180 - 45

5x = 135

x = 135÷5

x = 27

Answer 2

These types of angles are called alternate interior angles

Sum of alternate interior angles = 180

2x + 15 + 3x + 30 = 180

5x + 45 = 180

5x = 135

x = 135/5

x = 27