Circle theorem 4 - Cyclic Quadrilaterals
- Author:
- Sally Ganner, GreenMaths
- Topic:
- Circle, Quadrilaterals
Move point A or C. What do you notice about the angles?
Move point B or D. What do you notice? Can you explain these results?
When A or C are moved there is no change to the angles why is this?
Notice how the angles change when B or D are moved. Why is this?
What is the sum of the opposite angles?