Question

`m/_ABC = 39°`. What is its supplement and complement?

Answer 1

it's supplementary angle is 141 degrees. it's complement is 51 degrees.

Explanation:

supplementary angle are two angle whose sum is 180 degrees.
so 180 - 39 = ? that's the answer for supplement.
complimentary angle are two angle whose sum is 90 degrees.
so 90 - 39 =? that's the answer for compliment.

why did i subtract? because when you added the 39 plus the answer, te answer will be 180 or 90.