Question

Fill in the blanks
If three acute angles of a quadrilateral measure ${70}^0$ each, then the measure of the fourth angle is ____ .

Answer 1

Let the fourth angle be x.

So, ${70}^o+{70}^o+{70}^o+x={360}^o$

${210}^o+x={360}^o$

$x={360}^o-{210}^o$

$x={150}^o$.