circumference of a circle
c = 2πR
area of a circle
a = πr^2
area of a parallelogram
a = bh
area of a trapezium
a = 1/2 (a+b) h
area of a triangle
a = 1/2bh
SA of a cylinder
2πrh + 2πr^2
SA of a cone
πrS + πr^2
SA of a sphere
4πr^2
Volume of a cone
V = 1/3 πr^2h
Volume of a cylinder
V = πr^2h
Volume of a prism
V = Ah
Volume of a sphere
V = 4/3πr^3
Volume of a pyramid
V = 1/3Ah
Pythaora’s theorem
a^2 + b^2 = c^2