10.2%20Areas%20of%20Trapezoids,%20Rhombuses,%20and%20Kites

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10.2 Areas of Trapezoids, Rhombuses, and Kites
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Altitude

• To a base, is any segment perpendicular to the
  line containing the base from any point on the
  opposite side.

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8
11
7
13
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Find the area
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• Find the area of a rhombus with side lengths of
  12 and one angle of 120 degrees.

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Derivation of rhombus/kite area formula. Let one
diameter d1, and the other d2.