Geometric formulas

 b = base, c =circumference, d = diameter, h = height, l = length, r = radius, w = width, π = 3.1416

Circle

Area = π × r²

Area of sector =1/2r × length of arc

Circumference = π × d or 2π × r

Sphere

Circumference =3.8978 × ∛volume

Diameter = 1.2407 ×∛volume

Diameter = .56419 ×2√volume

Surface area = c × d

Volume = 1/6(surface area) ×d

Cylinder

Area = l × w

Triangle

Area =1/2 b × h

Cone

Volume = 1/3 h x (area of base)

Cylinder or prism

Volume = h x ( area of base)

Cube or rectangular box

Volume = l × w ×h