GCSE Maths Specification

Edexcel 1MA1

Section X: Appendix

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The following formulae will be provided for students within the relevant examination questions.

Perimeter, area, surface area and volume formulae

Where \(r\) is the radius of the sphere or cone, \(l\) is the slant height of a cone and \(h\) is the perpendicular height of a cone:

Curved surface area of a cone \(= \pi rl\)

Surface area of a sphere \(= 4\pi r^2\)

Volume of a sphere \(= \dfrac{4}{3}\pi r^3\)

Volume of a cone = \(\dfrac{1}{3}\pi r^2h\)