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 πd² 

circumference of a circle

= 2πr = πd

surface area of a sphere

= 4πr²= πd²

volume of a cube

= a³

surface area of a cube

= 6a² 

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