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7 Cards in this Set
- Front
- Back
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Alternate segment theorem: The angle between the tangent and the chord is the same as the angle in the alternate segment |
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The tangent at any point on a circle is perpendicular to the radius at that point. Also: tangents from an external point are equal in length |
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The opposite angles in a cyclic quadrilateral add up to 180 |
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The angle subtended by an arc at the centre of a circle is twice the angle subtended at any point on the circumference |
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The perpendicular line from the centre of the circle to the chord bisects the chord The perpendicular bisector of any chord passes through the centre |
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Angles subtended by the same arc are equal |
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The angle subtended at the circumference by a semicircle is a right angle |
