Question

An angle measures 130°. What is the measure of its supplementary angle?

• A. 30°
• B. 50°
• C. 70°
• D. 90°

Answer 1

The correct option is B 50°

If the sum of two angles is ${180}^o$, they are called supplementary angles.
Given : Measure of one angle is
${130}^o$.
Let the supplementary angle be $x$.

So, ${130}^o+x={180}^{o}x={180}^o-{130}^o={50}^{o}x={50}^o$
So, the supplementary angle is ${50}^o$.