Question

angle c and angle d are supplementary angles.if the measure of angle d is 80 degress,what is the measure of angle c

Answer 1

m∠C = 100°

Explanation:

Supplementary angles are angles that add up to 180°. We are given m∠D as 80°.

• This means that c + 80 = 180

Step 1: Subtract 80 from both sides.

• 
  `c+80-80=180-80`
• 
  `c=100`

Therefore, the answer is 100°.

Answer 2

C = 100

Explanation:

Supplementary angles equal 180 degrees

180 - 80 = 100