Question

Angle ${30}^{\circ }$ and twice of another angle $x$ are supplementary angles. Find the value of $x$ (in degrees).

Ans:___

Answer 1

Two angles are called supplementary angles if their sum is 180${}^{\circ }$.

$\therefore {30}^{\circ }+2x={180}^{\circ }$

$x={75}^{\circ }$