If angle A is a complement of angle B, angle B and angle C are vertical angles, and the supplement of C has a measure of 140°. Find the measure of A.

Question

asked Apr 13, 2020 155k views

1 Answer

Mark Giblin · Answer 1 · 2020-04-20T05:04:47+0000

Answer:

50°

Step-by-step explanation:

Complementary angles add up to 90°.

Supplementary angles add up to 180°.

Vertical angles are equal.

A + B = 90°

B = C

C = 180° − 140°

C = 40°

B = 40°

A = 50°