Question

How do you do this problem?

Answer 1

@Mertsj

Answer 2

The measure of an angle formed by a two tangents drawn from a point OUTSIDE the circle is half the the difference of the intercepted arcs

Answer 3

so 240 in half?

Answer 4

I tried so much stuff even adding both angles and THEN dividing it,i did 240 in half and i got it right,thank you!

Answer 5

So what that theorem says is that angle B = 1/2(arc ADC-arc AC) . Your job is to fill in everything you know and solve for the thing you don't know.