Question

One of the angles of a pair of co-interior angles is ${130}^{\circ }$. The other angle is ______.

• A. ${60}^{\circ }$
• B. ${70}^{\circ }$
• C. ${80}^{\circ }$
• D. ${50}^{\circ }$

Answer 1

The correct option is D

${50}^{\circ }$

The co-interior angles forms a pair of supplementary angles.
Let the angle be x.
So, ${130}^{\circ }+x={180}^{\circ }$
So, $x={50}^{\circ }$