Y12 006 Circles Flashcards
1
Q
Write down the standard form of the equation of a circle with centre (a,b) and radius r.
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2
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3
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4
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5
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6
Q
Tip
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A sketch usually helps!
7
Q
Give the relationship between a tangent to a circle at point P and the normal at point P.
A
The tangent and the normal are perpendicular making the normal go through the centre of the circle. The gradient of the normal and the gradient of the tangent will multiply to give -1 (they are negative reciprocals of each other).
8
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9
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10
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11
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12
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13
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14
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15
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