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Circle Theorem: Cyclic Quadrilateral

Author:Luke

Topic:Circle

Begin by moving a single point around the circle, what do you notice? Then move pairs of points around. Are there any special pairs of angles?

Select all that apply

A
Chords always make a square in a circle
B
2 pairs of angles in a cyclic quadrialteral are equal
C
Opposite angles in a cyclic quadrilateral add to 180 degrees
D
A cyclic quadrialteral has at least 1 right angle

Check my answer (3)

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