Circle Theorems

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Circle Theorem 1 - Two tangents...
Two tangents from the same point are equal in length.
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Circle Theorem 2 - The angle at...Twice...
The angle at the centre is twice the angle at the circumference.
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Circle Theorem 3 - Angles...Segment...
Angles in the same segment are equal.
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Circle Theorem 4 - An angle...Semi Circle...
An angle inscribed in a semi circle is always 90 degrees.
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Circle Theorem 5 - Cyclic quad...
Opposite angles in a cyclic quadrilateral add to 180 degrees.
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Circle Theorem 6 - Two radii...
Two radii make an isosceles triangle.
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Circle Theorem 7 - Tangent and radius...
A tangent and a radius make a right angle.
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Circle Theorem 8 - Alternate segment...
The angle between the tangent and chord at the point of contact is equal to the angle in the alternate segment. (Alternate segment theory).
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Circle Theorem 9 - Perpendicular bisector...
The perpendicular bisector of a chord passes through the circle's centre.
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Other cards in this set

Card 2

Front

The angle at the centre is twice the angle at the circumference.

Back

Circle Theorem 2 - The angle at...Twice...

Card 3

Front

Angles in the same segment are equal.

Back

Preview of the back of card 3

Card 4

Front

An angle inscribed in a semi circle is always 90 degrees.

Back

Preview of the back of card 4

Card 5

Front

Opposite angles in a cyclic quadrilateral add to 180 degrees.

Back

Preview of the back of card 5
View more cards

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