Last Updated: November 21, 2025
2D Shapes - Area
| Shape | Formula |
|---|---|
Square
|
A = s² |
Rectangle
|
A = l × w |
Triangle
|
A = ½bh |
Circle
|
A = πr² |
Trapezoid
|
A = ½(b₁ + b₂)h |
2D Shapes - Perimeter
| Shape | Formula |
|---|---|
Square
|
P = 4s |
Rectangle
|
P = 2l + 2w |
Triangle
|
P = a + b + c |
Circle (Circumference)
|
C = 2πr or πd |
3D Shapes - Volume
| Shape | Formula |
|---|---|
Cube
|
V = s³ |
Rectangular Prism
|
V = l × w × h |
Cylinder
|
V = πr²h |
Sphere
|
V = 4/3πr³ |
Cone
|
V = 1/3πr²h |
💡 Pro Tip:
Remember: area is measured in square units, volume in cubic units!