The diagram shows a circle with
centre O.
A, B, C and D lie on the circumference
of the circle.
ZACD = 77°.
![The diagram shows a circle with centre O A B C and D lie on the circumference of the circle ZACD 77 class=](https://us-static.z-dn.net/files/de3/4d2e2a79f303a34403f9176af92caa57.png)