Question

What's b? I got 30 but I have a feeling that's wrong.​

Answer 1

You are correct.

Explanation:

This is a semi circle. The central angle is 180 so the according to Thales Theorem, the angle that is opposite of the diameter is 90 degrees.

A triangle has at max 180 degrees So

`180 - 90 - 60 = x`

`30 = x`

So the angle is 30