Question

two angles whose sum is equal to 180 ​

Answer 1

Answer:

Supplementary angle: "if the sum of two angles is 180 degrees, or a straight angle, they are called supplementary angles

Answer 2

$\small\mathbb\pink{Supplementary \:angles}$

Two angles whose sum is equal to 180° is called supplementary angles .

Eg : 100° + 80° = 180°