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2014-02-21T08:30:16+07:00
K = 2.phi. r
43,96 = 2.3,14.r
43,96=6,28 r
r= 43,96/6,28
r= 7 cm
3 4 3
2014-02-21T08:30:48+07:00
K = 2 \pi r
43,96= 2 x 3,14 x r
43,96= 6,24 x r
r= 43,96/6,24
r= 7,044 cm