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11-1 HW SOLUTIONS 10. A = 528 cm2 12. A = mm2 14. A = 1440 in2 18. A = 98√3 mm2 20. A = 40.96√2 in2 22. A = cm2 24. b=13, h= h=7, b= 14
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11-2 Areas of Trapezoids, Rhombi, and Kites
Ms. Andrejko
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Real-World
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Vocabulary Height of a Trapezoid- the perpendicular distance between its bases
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Area Formulas Area of Trapezoid Area of Rhombus or Kite
A = ½ h (b1 + b2) Area of Rhombus or Kite A = ½ d1d2
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Examples
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Practice
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Examples
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Practice
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Examples A trapezoid has base lengths of 6 and 15 centimeters with an area of square- centimeters. What is the height of the trapezoid? One diagonal of a kite is four times as long as the other diagonal. If the area of the kite is 72 square meters, what are the lengths of the diagonals?
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Practice A trapezoid has base lengths of 19.5 and centimeters with an area of 154 cm2.What is the height of the trapezoid? One diagonal of a kite is twice as long as the other diagonal. If the area of the kite is 400 square meters, what are the lengths of the diagonals?
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