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Area and Perimeter Formulas
Area of a triangle A = ½ bh
Area of a
parallelogram
A = bh
Area of a rectangle A = lw
Area of a trapezoid A = ½ (b1+b2)h
Area of a circle A = πr2
Area of a square A = s2
Perimeter of a
rectangle
P = 2l + 2w
Circumference of a
circle (BOTH)
C = πd
C = 2πr
Perimeter of a
rectangle
P = 2l + 2w
Area of a triangle A = ½ bh
Area of a
parallelogram
A = bh
Circumference of a
circle (BOTH)
C = πd
C = 2πr
Area of a rectangle A = lw
Area of a trapezoid A = ½ (b1+b2)h
Area of a square A = s2
Area of a circle A = πr2
Area of a
parallelogram
A = bh
Circumference of a
circle (BOTH)
C = πd
C = 2πr
Area of a triangle A = ½ bh
Area of a rectangle A = lw
Area of a circle A = πr2
Perimeter of a
rectangle
P = 2l + 2w
Area of a square A = s2
Area of a trapezoid A = ½ (b1+b2)h
Circumference of a
circle (BOTH)
C = πd
C = 2πr
Area of a rectangle A = lw
Area of a
parallelogram
A = bh
Area of a circle A = πr2
Area of a square A = s2
Area of a triangle A = ½ bh
Perimeter of a
rectangle
P = 2l + 2w
Area of a trapezoid A = ½ (b1+b2)h

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