Đáy bé :
65,8x45%=29,61(m)
Chiều cao :
65,8x60%=39,48(m)
Diện tích :
\(\frac{\left(29,61+65,8\right)\times39,48}{2}=1883,3934\left(m^2\right)\)
Đ/s:.........
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