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various formulas for math. based on the Mensuration chapter of the Extended Mathematics for IGCSE by David Rayner textbook.

area of a trapezoid


area of a kite

½(product of diagonals)

area of a parallelogram

bh OR basin∅

area of a circle




area of a prism

(area of base)(h)

sector area

(∅ ÷ 360)(πr²)

arc length

(∅ ÷ 360)(πd)

volume of a cylinder


volume of a pyramid

1/3(base area)(h)

volume of a cone


volume of a sphere


surface area of a cylinder


surface area of a sphere


surface area of a cone


cosine rule for a side

a² = b² + c² - (2bccosA)

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