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sisi miring segitiga=akar16"+12"=akar256+144=akar400=20
L=2Lsegitiga + L jmlh sisisejajar
L=2xaxtx1/2 + LPP1 + LPP2+LPP3
L=2x24x16x1/2 + 20x22 + 20x22 + 24x22
L=384+440+440+528
L=1792 cm2
nomor 3
a)sisi belah ketupat=akar6"+8"=36+64=akar100=10
b))L=Lbelahketupat
L=d1xd2x1/2
L=16X12X1/2
c)L=Lbelahketupat + 4Lsisitegak
L=d1xd2x1/2 + 4xpxl
L=16X12X1/2 + 4X10X18
L=96 + 45=141 cm2