Chapter 6: Quadrilaterals – Flashcards
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rhombus corollary
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a quadrilateral is a rhombus iff it has four congruent sides
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rectangle corollary
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a quadrilateral is a rectangle if and only if it has four right angles
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square corollary
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a quadrilateral is a square iff it is a rhombus and a rectangle
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midsegment theorem for trapezoids
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the midsegment of a trapezoid is parallel to each base and its length is one half the sum of the lengths of the base
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area of a square
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a=s2
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area of a rectangle
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a=bh
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area of a parallelogram
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a=bh
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area of a triangle
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a=1/2bh
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congruence postulate
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if two polygons are congruent, then they have the same area
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addition postulate
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the area of a region is the sum of the areas of its nonoverlapping parts
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area of a trapezoid
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a=1/2h(b1+b2)
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area of a kite
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a=1/2d1d2
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area of a rhombus
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a=1/2d1d2
