Area & Perimeter Calculator
Calculate area and perimeter for common 2D shapes.
Rectangle
Circle
Triangle
Trapezoid
Area
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Perimeter
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Area & Perimeter Formulas
| Shape | Area | Perimeter |
|---|---|---|
| Rectangle | A = l × w | P = 2(l + w) |
| Circle | A = πr² | C = 2πr |
| Triangle | A = ½bh | P = a + b + c |
| Square | A = s² | P = 4s |
| Trapezoid | A = ½(a + b)h | P = a + b + c + d |