Question

in which group will the given angles (160° and 20°) will fall if their sum is 180°​

Answer 1

Complementary angles

Complementary angles are two angles with a sum of 90 ^\circ90∘90, degrees. A common case is when they form a right angle. 

Supplementary angles

Supplementary angles are two angles with a sum of 180 ^\circ180∘180, degrees. A common case is when they lie on the same side of a straight line.