1.Oblicz pole koła o promieniu
a) r=2cm
b) r=5cm
c) r=6cm
o średnicy
a) d=4cm
b) d=20cm
c) d=80cm
P=πr²
srednica = 1/2r
P=π2²=4πcm²
P=π5²=25πcm²
P=π6² = 36πcm²
r=1/2r = 2 cm
r=20/2=10 cm
P=π10² cm=100π cm²
r=80/2=40cm
p=π40² = 1600πcm²
P=πr^2
a)
dla r =2cm π=3,14 - w przyblizeniu
P=3,14*2^2
P=12,56 cm^2
B)
dla r =5cm
P=3,14*5^2
P=78.5 cm^2
c)
dla r = 6cm
P=3,14*6^2
P=113.04 cm^2
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P=πr²
srednica = 1/2r
a) r=2cm
P=π2²=4πcm²
b) r=5cm
P=π5²=25πcm²
c) r=6cm
P=π6² = 36πcm²
o średnicy
a) d=4cm
r=1/2r = 2 cm
P=π2²=4πcm²
b) d=20cm
r=20/2=10 cm
P=π10² cm=100π cm²
c) d=80cm
r=80/2=40cm
p=π40² = 1600πcm²
P=πr^2
a)
dla r =2cm π=3,14 - w przyblizeniu
P=3,14*2^2
P=12,56 cm^2
B)
dla r =5cm
P=3,14*5^2
P=78.5 cm^2
c)
dla r = 6cm
P=3,14*6^2
P=113.04 cm^2
a) d=4cm
r=1/2r = 2 cm
P=π2²=4πcm²
b) d=20cm
r=20/2=10 cm
P=π10² cm=100π cm²
c) d=80cm
r=80/2=40cm
p=π40² = 1600πcm²