Question

Find the value of $a$ in the following figures.

Answer 1

As we kno that sum of internal angles in a quadrilateral is equal to $360°$.

Therefore,

$a+90°+2a+90°=360°$

$\Rightarrow 3a=360°-180°$

$\Rightarrow a=\frac{180°}{3}=60°$

Hence the value of $a$ is $60°$.