CHAPTERS BY WACEK KIJEWSKI

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# Chapter 15 Formulae for Area and Volume

area of a square

= a2

area of a rectangle

= a × b

area of a triangle

= ½ (a × h)

area of a trapezium

= ½ (a + b) × h

area of a circle

= πr2 = ¼ πd

circumference of a circle

= 2πr = πd

surface area of a sphere

= 4πr2= πd2

volume of a cube

= a3

surface area of a cube

= 6a

volume of a sphere

= 4/3πr3

volume of a cylinder

= πr2h

surface area of a cylinder

= 2πr (h + r)

volume of a pyramid

= 1/3 a × b × h

volume of a cone

= 1/3 πr2 h

 

volume of a prism

= area of base (trapezium or triangle) × height 

 

 
 

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