Maths - Circle formulae 0.0 / 5 ? Mathematics2D and 3D shapeGCSEEdexcel Created by: herecomeiCreated on: 04-02-14 21:48 Formula for Circumference of a circle (pi) D or 2(pi)r 1 of 6 Formula for the Area of a circle (pi) r^2 2 of 6 Area of a semicircle 1/2 x (pi) x r^2 3 of 6 Area of a quarter circle 1/4 x (pi) x r^2 4 of 6 Perimeter of a semicircle (pi) x r + 2 x r 5 of 6 Perimeter of a quarter circle 1/2 x (pi) x r + 2 x r 6 of 6
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