Question

What is the value of x? A. 15B. 21C. 26D. 105

Answer 1

From the figure given

The vertically opposite angles of lateral lines are equal. Hence

$\begin{gathered} (5x)=90^0+15^0 \\ 5x=105^0 \\ x=\frac{105^0}{5} \\ x=21^0 \end{gathered}$