Jawabanmu

2014-04-25T14:30:07+07:00
T▲^2=7,5^2-4,5^2=56,25-20,25=36 | t▲=6 | Lp=4(L▲)+La=4(1/2×9×6)+9×9=108+81=189 semoga membantu^^
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2014-04-25T14:36:01+07:00
T ²=7,5 ²+4,5 ² t ²=56,25+20,25 t ²=76,5 t=8,7 luas prmukaan=(9x9)+[4x(1/2x9x8,7)] =81+(4x0,5) =81+2=83
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