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1/2bd = alas segitiga siku siku=12/2=6
√ dr 8 kuadrat + 6 kuadrat = ed
ed= √64+36 =√100=10
ed=cd=bc=af= 10
ab=ef= 15
ed+cd+bc+af+ab+ef=keliling
10+10+10+10+15+15=70=keliling