Question

Sum of two adjacent angles is 90 degrees. If one angle is 15 degrees, then find the other.

• A. 15 degrees
• B. 75 degrees
• C. 35 degrees
• D. 65 degrees

Answer 1

The correct option is B 75 degrees

Given: Sum of the adjacent angles is ${90}^{\circ }$.

Let the required angle be x.
$x+{15}^{\circ }={90}^{\circ }$ (Given)
$\Rightarrow x={90}^{\circ }-{15}^{\circ }={75}^{\circ }$
$\Rightarrow x={75}^{\circ }$
So, the required angle measures ${75}^{\circ }$.