如图ABCD是平行四边形,AD=8cm,AB=10cm,角DAB=30°,高CH=4cm,弧BE、DF分别以AB、CD为半径,AD、CB为半径,阴影部分的面积是多少?
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![如图ABCD是平行四边形,AD=8cm,AB=10cm,角DAB=30°,高CH=4cm,弧BE、DF分别以AB、CD为半径,AD、CB为半径,阴影部分的面积是多少?](/uploads/image/z/2502444-12-4.jpg?t=%E5%A6%82%E5%9B%BEABCD%E6%98%AF%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%2CAD%3D8cm%2CAB%3D10cm%2C%E8%A7%92DAB%3D30%C2%B0%2C%E9%AB%98CH%3D4cm%2C%E5%BC%A7BE%E3%80%81DF%E5%88%86%E5%88%AB%E4%BB%A5AB%E3%80%81CD%E4%B8%BA%E5%8D%8A%E5%BE%84%2CAD%E3%80%81CB%E4%B8%BA%E5%8D%8A%E5%BE%84%2C%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%98%AF%E5%A4%9A%E5%B0%91%3F)
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