Question

In triangle ABC, the measure of angle CAB is 80° and the measure of angle ABC is 45.5°.

What is the measure of angle BCA in degrees?


A 125.5°

B 54.5°

C 55.5°

D 64.5°

Answer 1

Answer: B

Because triangles add up to 180 degrees, all you need to do is subtract 45.5 and 80 from 180, which gives you 54.5 degrees.

Hope this helped you!