Question

Find the angle measure $x$ in the following figures

• A. ${140}^o$
• B. ${120}^o$
• C. ${180}^o$
• D. ${220}^o$

Answer 1

The correct option is A ${140}^o$

Since the sum of angles (interior angles) of a quadrilateral is ${360}^o$
$x+{70}^o+{60}^o+{90}^o={360}^o$
$x+{220}^o={360}^o$
$x={360}^o{220}^o={140}^o$