Answer:

C

explanation:

Because when you add the value of letter a,b and d you will get and answer of 180°. And when you add 90and80 you will get 170°.

Two angles are called supplementary when their measures add up to 180 degrees.

Answer:

C. is the correct answer.

(Mark this as the brainliest thanks!)

Step-by-step explanation:

We all know that supplementary angle is equal to 180 degrees.

A is supplementary because 160+20=180°

B is supplementary because 140+40=180°

D is supplementary because 70+110=180°

C is not supplementary because 90+80=170°