FORMULAS
FOR BASIC SHAPES
1. Rectangle
Perimeter: 2L + 2W
Area: L x W
2. Square
Perimeter: s+s+s+s
Area: s x s
3. Parallelogram
Perimeter: a + a + b + b = 2 × a + 2 × b
Area: b × h
4. Rhombus
Perimeter: b + b + b + b = 4 × b
Area: b × h
5. Triangle
Perimeter: a + b + c
Area: (b x h) / 2
6. Trapezoid
Perimeter: a + b + c + d
Area:
7. Circle
Perimeter: 2 × pi × r or Perimeter = pi × d
Area: pi × r2 or Area = (pi × d2)/4
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Area: pi × r2 or Area = (pi × d2)/4
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