Question

What is the value of x in the figure shown below?

Answer 1

angle ACD = 180°-100°-30° (int angles, AC//BD)

= 50°

x° = 50°-30°

= 20°

Hence, x=20

Answer 2

• x = 50

Explanation:

The figure is a parallelogram. According to its property the adjacent angles are supplementary.

A and C are supplementary as adjacent angles.

Supplementary angles add up to 180°:

• x + 30 + 100 = 180
• x = 180 - 130
• x = 50