Answers for this plus work please. Hurry Due in 30 minutes

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.

How do you write a paragraph proof to prove that the corresponding angles shown are congruent