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12 Cards in this Set
- Front
- Back
area of a parallelogram
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A = bh
where: b is the base h is the height |
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area of a triangle
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A = ½ bh
where: b is the base h is the height |
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area of a trapezoid
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A = ½ h(b₁ + b₂)
where: b₁ and b₂ are the bases h is the height |
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area of a rhombus
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A = ½ d₁ d₂
where d₁ and d₂ are the diagonals Example: A = ½ (AC)(BD) |
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area of congruent figures
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equal areas
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apothem
(define) |
the segment from the center of a regular polygon perpendicular to a side of the polygon
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apothem of an regular n-gon
(calculate) |
a = ½ s / tan(360 / n)
where: a is the apothem s is the length of a side |
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area of a regular polygon
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A = ½ Pa
where: P is the perimeter a is the apothem |
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area of a circle
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A = πr²
where r is the radius |
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irregular figure
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a figure that cannot be classified into the shapes we've studied
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area of a region
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the sum of the areas of it nonoverlapping parts
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irregular polygon
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a polygon that is not regular
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