Question

Find the value of the unknown interior angle x in the following figures.

Answer 1

Since, Exterior angle = Sum of interior opposite angles, therefore,
$x+{50}^{\circ }={115}^{\circ }$ or, $x={115}^{\circ }-{50}^{\circ }$

$\Rightarrow {115}^{\circ }-{50}^{\circ }={65}^{\circ }$

$\Rightarrow x={65}^{\circ }$