Question

In a figure Find value of x

Answer 1

$4x+5x+{90}^o={180}^o$ (a measure of the angle of a triangle)

$⟹9x+{90}^o={180}^o$

$⟹9x={180}^o-{90}^o$

$⟹9x={90}^o$

$⟹x=\frac{{90}^o}{9}$

$⟹x={10}^o$

value of $x={10}^o$