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k.lingkaran=1/2*22/7*2*r
k.pp=2.25+2.21
k.pp=50+42
k.pp=92
k.l=1/2*22/7*2*10.5
k.l=21*1/2*22/7
k.l=66/2
k.l=33
k.da=92-33
k.da=59