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o średnicy 2 cm.
b) pole koła o średnicy 1 cm.
c) pole koła o promieniu 1 cm.
a) P = πr²
r = 1cm
P = π
b) r = 0,5cm
P = 0,25π
c) r = 1cm
P = π
jak coś to π≈3,14
r = 1 cm
p = Pi12
P= 1Pi
b) r = 0,5 cm
P= PiR2
P = Pi0,52
P = 0,25 Pi
c) P = PiR2
r = 1 cm
P = Pi12
P = 1 Pi
a)d=2r r=1 cm
P=π x 1² =πcm²
b) r=0,5 cm
P= π x (0,5)²= 0,25π cm²
c)r=1cm
P=π x 1² =π cm²