Question

Question and Picture posted Below Please help!

AC is a diameter, points B and D are on the circle, the measure of arc AB=60º, and m∠ACD=40º. Find m∠B

Answer 1

Angle B is going to be 90 degrees, because it is half of a semicircle, or 1/2(180)=90.

Answer 2

Got it?

Answer 3

Yes Thankyou :)

Answer 4

@OakTree How would i do it if i were looking for the measure of ∠DAC

Answer 5

You would do the same.