This geometry formulas reference lists the area, perimeter and volume formulas for the common 2D shapes and 3D solids.
2D shapes (area & perimeter)
| Shape | Formula |
|---|---|
| Square | Area = s², Perimeter = 4s |
| Rectangle | Area = l × w, Perimeter = 2(l + w) |
| Triangle | Area = ½ × b × h |
| Circle | Area = πr², Circumference = 2πr |
| Parallelogram | Area = b × h |
| Trapezoid | Area = ½(a + b) × h |
3D solids (volume & surface area)
| Solid | Formula |
|---|---|
| Cube | V = s³, SA = 6s² |
| Rectangular prism | V = l × w × h |
| Sphere | V = 4⁄3 πr³, SA = 4πr² |
| Cylinder | V = πr²h, SA = 2πr² + 2πrh |
| Cone | V = ⅓ πr²h |
| Pyramid | V = ⅓ × base area × h |