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2010-01-14T16:43:22+01:00
L = 36πcm
d = ?

l = 2πr
2πr = 36πcm /:2
πr =18πcm /: π
r = 18cm

d=2r
d = 2 x 18
d = 36cm
1 5 1
2010-01-14T16:48:33+01:00
L=2πr
l=36πcm
2πr=36πcm /:2π
r=36πcm:2π
r=18cm
średnica = 2r = 18cm × 2 = 36cm
2010-01-14T17:03:23+01:00
Obw = 36 π cm
obw = 2 * π * r
36 π cm = 2 * π * r
r = 36 π cm : 2
r = 18 cm
d = 2 * r
d = 2 * 18 cm
d = 36 cm