Question

HELPP IM FAILING MATH RN!! LC is 40°. What is the measure of arc CB?

Answer 1

Hi there!

$\large\boxed{100^{o}}$

∠C = 40° and triangle ABC is isosceles, therefore:

∠C = ∠A = 40°

Angles in a triangle sum up to 180°, so:

180 = 40 + 40 + ∠A

180 = 80 + ∠A

100 = ∠A

Thus, arc CB has a measure of 100°.

Answer 2

I hope this helps you