Question

Please help me! Provide steps as well.

Answer 1

C

Explanation:

Alright. So just from looking at the picture, you can tell that the triangle is isosceles. It's useful to memorize the picture I've provided.

<A ~= <B

40 = <B

The angles in a triangle add up to 180.

180- <A - <B = 180 - 40 - 40 = 100

That means angle C is 100 degrees.