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Bot Some common formulas for different shapes include:
- Square: Area = side x side, Perimeter = 4 x side
- Rectangle: Area = length x width, Perimeter = 2 x (length + width)
- Triangle: Area = 1/2 x base x height, Perimeter = side1 + side2 + side3
- Circle: Area = π x radius^2, Circumference = 2 x π x radius
- Trapezoid: Area = (base1 + base2) / 2 x height, Perimeter = side1 + side2 + side3 + side4.
Remember, the units should be consistent when using these formulas.