Question

Need help with Circles and Angles problem. Find d. Picture in comments.

Answer 1

This diagram is extremely confusing.

Answer 2

familiar with inscribed angle theorem ?

Answer 3

Unfortunately not. I figured it out though. Answer was 90. I'd still like to know the theorem though!

Answer 4

90 is not correct

Answer 5

see this for inscribed angle theorem
https://www.khanacademy.org/math/geometry/cc-geometry-circles/central-inscribed-circumscribed/v/inscribed-and-central-angles