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=7/22x 132
=42
r= 42/2
=21
k=3,14xd
62,8=3,14xd
d=3,14/62,8
=0,05
r=0,05/2
0,025
K =
132 = 2
42cm = 2r
d = 2 x r = 2 x 42 = 84cm
B.
K =
62,8cm = 2 . 3,14 . r
62,8cm = 6,28r
10cm = r
d = 2 x r = 2 x 10 = 20cm