已知平行四边形的面积是72cm²，求阴影部分的面积。你能用两种方法计算吗？试试看。5C8K*_3M'N2E8R0[:A8R9s+k
5C8K*_3M'N2E8R0[:A8R9s+k
算式：提示,@)E:a+]7o2^5C8K*_3M'N2E8R0[:A8R9s+k
答：阴影部分的面积7N(@8|(W,|-z+Y;J1t1}(u平方厘米。5C8K*_3M'N2E8R0[:A8R9s+k