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=31.4cm
b. k=34.54cm
c. k=37.68cm
d.k=40.82cm
e.k=44cm
a. d=10 r=10:2=5
2x3,14x5=31.4
b.d=11 r=11:2=5,5
2x3.14x5,5=34,21
c. d=12 r=6
2x3,14x6=37,68
d. d=13 r=6,5
2x3.14x6,5=40,82
e. d=14 r=7
2x22per7x7=44