Question

Two angles are complementary. If one measures ${80}^{\circ }$, then the measure of the other angle is:

• A. ${80}^{\circ }$
  
• B. ${120}^{\circ }$
  
• C. ${10}^{\circ }$
  
• D. ${360}^{\circ }$
  

Answer 1

The correct option is C

${10}^{\circ }$

${80}^{\circ }+\text{Complementary angle}={90}^{\circ }\text{Complementary angle}={90}^{\circ }-{80}^{\circ }={10}^{\circ }$