黄:[65x40+(65-10)x40+40x40]x2
=[2600+2200+1600]x2
=6400x2
=12800(cm2)
红:40x[40+40+(65-40)+40+10+40+(65-10)]
=40x[80+65+10+95]
=40x250
=10000(cm2)
黄:[65x40+(65-10)x40+40x40]x2
=[2600+2200+1600]x2
=6400x2
=12800(cm2)
红:40x[40+40+(65-40)+40+10+40+(65-10)]
=40x[80+65+10+95]
=40x250
=10000(cm2)