Question

Find the value of x.

Answer 1

89°

Explanation:

The sum of the interior angles of any quadrilateral is 360°

So,

360° - 154° - 88° - 29°

= 89°

Answer 2

x = 89

Explanation:

The interior angles of a quadrilateral sum to 360°.

Therefore:

⇒ 88° + 154° + 29° + x° = 360°

⇒ 271° + x° = 360°

⇒ 271° + x° - 271° = 360° - 271°

⇒ x° = 89°

⇒ x = 89