Question

Three angles of a quadrilateral measure ${37}^{\circ }$, ${130}^{\circ }$ and ${53}^{\circ }$. Find the measure of the fourth angle.

• A. 40
• B. 50
• C. 90
• D. 140

Answer 1

The correct option is D

140

Let the fourth angle be $x$

By angle sum property, we know that ${37}^{\circ }+{130}^{\circ }+{53}^{\circ }+x=360˚$

$\Rightarrow x={360}^{\circ }-({37}^{\circ }+{130}^{\circ }+{53}^{\circ })={140}^{\circ }$