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Flashcards in Circle Theorems Deck (7)
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1

1)

The angle subtended by an arc at the centre is twice the angle subtended at the circumference

2

2)

The angles at the circumference subtended by the same arc are equal

3

3)

The opposite angles in a cyclic quadrilateral add up to 180°.

4

4)

The angle at the circumference in a semicircle is a right angle.

5

5)

The angle between a tangent and a radius is 90°.

Tangents which meet at the same point are equal in length.

6

6)

The perpendicular from the centre of a circle to a chord bisects the chord.

7

7)

The angle between a tangent and a chord is equal to the angle in the alternate segment.