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求阴影部分面积大全1.2.3.4.5.6.7.66666668.9.10.11.12.64810126613 14.15.16.17.24468818.19.20.21.22.23.8.2OO.84.86422O12150 24.425.26.27.28.29.668881030.31.32.33.34.44448.450450O881235.36.37.38.39.40.O.4206O8210841.42.43.44.45.105466859121020第 1 页 46.47.48.49.50.610886644663351.52.53.54.55.56.EA4BC42108368464D10AEBD 是梯形10710两个完全相同的直角三角形57 58.59.60.61.62.63.646266 66444106S=25三角形C =12.56圆64.65.66.67.68.69.42. .6366663450444 70.71.72.73.74.75.624106004504503206S =S圆 长方形C =12.56圆76.77.78.79.80.81.82.83.444446644284.85.86.87.88.89.90.466820844620四个等圆d=10第 2 页