Area of a square
s² or d²/2
Area of a triangle
bh/2
Area of a circle
πr²
Area of a trapezoid
(b₁ + b₂) / 2 * h
Area of a parallelogram
b*h
Area of a rectangle
l*w
Area of a rhombus / kite
(d₁d₂)/2
Total Surface Area of a sphere
4 πr²
Total Surface area of a cylinder
2πr^2 + 2πrh
Total Surface area of a cube
6s²
total surface area of a cone
πr² + πrh
Volume of a triangular prism
1/2bhl
volume of a cube
s^3
volume of a rectangular prism
lwh
volume of a cone
(πr²h)/3
Volume of a sphere
(4πr^3)/3
volume of a cylinder
πr²h
Perimeter of a square
4s
Perimeter of a rectangle
2l + 2w
Corcumference of a circle
2πr
Center radius form
(x-h)² + (y-k)² = r²
where
(h,k) is the center