Question

What is the supplement angle of 128°?

• A. ${128}^{\circ }$
• B. ${180}^{\circ }$
• C. ${90}^{\circ }$
• D. ${52}^{\circ }$

Answer 1

The correct option is D

${52}^{\circ }$

Two angles are said to be supplementary if their sum is ${180}^{\circ }$

$\text{Supplement of}{128}^{\circ }={180}^{\circ }-{128}^{\circ }={52}^{\circ }$