求阴影部分面积大全1.2.3.4.5.6.7.8.9.10.11.12.13．14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.39.40.41.42.43.44.45.66666648101266668468261006612684.8.O8826424.O.O3261501026646868686.O868646861264506450646468626206.O.O461068646569561012106820465646.47.48.49.50.51.52.53.54.55.56.57．58.59.60.61.62.63.64.65.66.67.68.69.70.71.72.73.74.75.76.77.78.79.80.81.82.83.84.85.86.87.88.89.90.S圆=S长方形第1页1085686885684545681056634EABCDAEBD是梯形梯形64832两个完全相同的直角三角形81064471010C圆=12.566662S三角形=251066664444每个圆的C=25.12...642644504506463634C圆=12.56234645020600610450444664444238386664448四个等圆d=1082020第2页
