Geometry Formula Reference Sheet b – base, h – height, h – height of the prism Rectangles l – length, w – width, h -­‐ height w l Perimeter -­‐ 2l + 2w Area -­‐ lw Rectangular prism Volume – lwh Surface Area – 2lw (top and bottom) + 2lh(front and back) + 2wh (each side) Volume – ½bh * h Italic h represents the height of the prism Perimeter – b + side (a) + side (c) !
Area -­‐ bh !
Triangular Prism Pyramid b – base/side, h – height of the triangles Trapezoid 𝒃𝟏 -­‐ top of trapezoid, 𝒃𝟐 -­‐ base of trapezoid, h -­‐ height Perimeter -­‐ 𝑏! + 𝑏! + side (c) + side (d) Area – ½ h (𝑏! + 𝑏! ) Parallelogram b – base, h – height, a -­‐ side Perimeter – 2b + 2a Area -­‐ bh Surface Area -­‐ 𝑠 ! + 4 ½ bh Circles r – radius, d – diameter, h – height r Circumference – 𝜋d or 2r 𝜋 Area -­‐ 𝜋𝑟 ! Cylinder Triangles Surface area -­‐ 2 𝜋𝑟 ! + 2 𝜋rh