d = 5cm
d = 2r
5cm = 2r
r = 5cm :2
r = 2,5cm
P = π r² = π * 2,5² = π * 6,25 = 6,25π cm² ------- odpowiedź
P= πr²
P=π(2.5)²
P= 6.25π = 6.25* 3.14=19.63
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d = 5cm
d = 2r
5cm = 2r
r = 5cm :2
r = 2,5cm
P = π r² = π * 2,5² = π * 6,25 = 6,25π cm² ------- odpowiedź
P= πr²
P=π(2.5)²
P= 6.25π = 6.25* 3.14=19.63