Jawabanmu

2014-04-27T20:56:52+07:00
A. Keliling :60cm Luas: 216cm
b. Keliling : 82cm Luas: 400cm
c. K: 90cm L: 450cm
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2014-04-27T20:56:56+07:00
A. K = 2 (18+12) =2 (30) = 60
     L=18.12 =216
b. K = 2 (25+16)=2(41)=82
     L =25.16 =400
c.  K =2(30+15)=2(45)=90
     L = 30.15=450
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