Basic Geometry Formula Reference Cheat Sheet

Geometry is the branch of mathematics that deals with the shapes, properties, and features of figures. Given below is the basic geometry formula reference sheet.

List of Basic Shapes

1. Triangle
   • Perimeter: P = a + b + c
   • Area: A = 1/2 * (b*h)
2. Rectangle
   • Perimeter: P = 2l + 2w
   • Area: A = lw
3. Circle
   • Circumference: C = 2πr
   • Area: A = πr²
4. Parallelogram
   • Perimeter: P = 2a + 2b
   • Area: A = bh
5. Trapezoid
   • Perimeter: P = a + b + c + d
   • Area: A = 1/2 h (a + b)