如图,三角形BFG面积=三角形FGC面积=S, 则S1*S = 11*8, S2*S=8*7, 又S1+11+S2+7=11+7+S=平行四边形ABCD面积的一半
即 88/S+56/S=S, 所以S=12, 平行四边形ABCD面积=2*(11+7+12)=60
如图,三角形BFG面积=三角形FGC面积=S, 则S1*S = 11*8, S2*S=8*7, 又S1+11+S2+7=11+7+S=平行四边形ABCD面积的一半
即 88/S+56/S=S, 所以S=12, 平行四边形ABCD面积=2*(11+7+12)=60
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