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# Have I done this correctly? watch

1. http://prntscr.com/b0wy6r

Also, I wanted to know is the quadrilateral AOCB a cyclic quadrilateral ? Or is it only a cyclic quadrilateral if the points touch the circumference of the circle? Thanks
2. (Original post by junayd1998)
http://prntscr.com/b0wy6r

Also, I wanted to know is the quadrilateral AOCB a cyclic quadrilateral ? Or is it only a cyclic quadrilateral if the points touch the circumference of the circle? Thanks
AOCB is not a cyclic quadrilateral - a cyclic quadrailateral is one whose vertices lie on the circumference of the circle.

3. (Original post by Zacken)
AOCB is not a cyclic quadrilateral - a cyclic quadrailateral is one whose vertices lie on the circumference of the circle.

Yay!!!!!!!!! Oh okay yeah that is what i thought.
4. (Original post by Zacken)
AOCB is not a cyclic quadrilateral - a cyclic quadrailateral is one whose vertices lie on the circumference of the circle.

So AOCB is just a normal quadrilateral? That totals up to 360 degrees but opposite angles don't add up to 180?
5. (Original post by junayd1998)
So AOCB is just a normal quadrilateral? That totals up to 360 degrees but opposite angles don't add up to 180?
Yep.

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