Area formulas
SQUARE
RECTANGLE
Area of a square = length × length
Area of a rectangle = length × width
A = l2
A = lw
TRAPEZOID
Area of a trapezoid =
A=
1
(a + b) h
2
1 (sum of
× height
2 parallel sides)
TRIANGLE
Area of a triangle =
1
base × height
2
A=
PARALLELOGRAM
Area of a parallelogram = base × height
1
bh
2
A = bh
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