Question

Which angle pairs must be supplementary? Select the 4 answers that apply.

angles 1 and 8

angles 2 and 7

angles 1 and 7

angles 2 and 6

angles 4 and 5

angles 3 and 4

Answer 1

It would be the pairs 1 and 8, 2 and 7, 4 and 5, and 2 and 4. This is because each pair is equal to 180 degrees, making them supplementary.

Answer 2

angles 1 and 8

angles 2 and 7

angles 3 and 4

angles 4 and 5

Explanation:

Remember that when you have a line cutting thru two parallel lines you will get 2 types of angles, congruent and supplementary, the congruent angles are angles that are equal to eachother, and the supplementary are angles that added together are 180º or a straight line, so to select the supplementary angles you just have to find the angles that are on the same straight line and that form beteween the two of the 180º angles.