Question

PLEASE HELP ME WITH CIRCLES


I have to solve for x,y, and z but I don't fully understand how especially with this being a circle. Please help!

(Diagram in comments)

Answer 1

Maybe this page will help you

http://en.wikipedia.org/wiki/Cyclic_quadrilateral

Answer 2

That wasn't helpful at all :(

Answer 3

What about the bit about opposite angles being supplementary?

Answer 4

No, not really.

Answer 5

Do you actually have any idea at all how to start to do this problem?

Answer 6

I have a formula

Answer 7

That's from the textbook

Answer 8

4 angles sum to 360?

Answer 9

m angle D+ m angle F= m angle E+ m angle G=180degrees

Answer 10

What's E and F?

Answer 11

and G?

Answer 12

This is from the book

Answer 13

That's what I said before, 4 angles sum to 360 (not 180)

Answer 14

Oh. Well then the textbook is wrong I suppose lol

Answer 15

So how do I do that? What do I substitute?

Answer 16

Do you know the rule that the angle subtended at the centre of a circle is double the size of the angle subtended at the edge from the same two points.