Year 9 Maths Formulas

Front

Area of a rectangle

Back

A = l × w

Front

Circumference of a circle

Back

C = 2πr

Front

Pythagorean theorem

Back

a² + b² = c²

Front

Area of a triangle

Back

A = 1/2 × b × h

Front

Volume of a rectangular prism

Back

V = l × w × h

Front

Quadratic formula

Back

x = (-b ± √(b² - 4ac)) / 2a

Front

Area of a circle

Back

A = πr²

Front

Volume of a cylinder

Back

V = πr²h

Front

Slope of a line

Back

m = (y₂ - y₁) / (x₂ - x₁)

Front

Simple interest

Back

I = P × r × t