1)Oblicz pole koła
a)o promieniu 1,5cm
b)o średnicy 8i4 7mm
c)o promieniu 1i2 3m
d)o średnicy 3,5dm
pk = r²π
a)r=1,5cm
pk=1,5²π
pk=2,25π
c)r=1⅔m
pk=1⅔²π
pk=4 i jedna szosta
d)d=3,5dm
r=1,75
pk=1,75²π
pk=3,0625π
P=πr²
a)P=π1,5²=2,25π cm²
b)d=8mm
r=4mm
P=π4²=16π mm²
d=47mm
r=23,5mm
P=π23,5²=552,25π mm²
c)P=π1²=π m²
P=π23²=529π m²
r=1,75dm
P=π1,75²=3 1/16π dm²
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pk = r²π
a)r=1,5cm
pk=1,5²π
pk=2,25π
c)r=1⅔m
pk=1⅔²π
pk=4 i jedna szosta
d)d=3,5dm
r=1,75
pk=1,75²π
pk=3,0625π
P=πr²
a)P=π1,5²=2,25π cm²
b)d=8mm
r=4mm
P=π4²=16π mm²
d=47mm
r=23,5mm
P=π23,5²=552,25π mm²
c)P=π1²=π m²
P=π23²=529π m²
d)d=3,5dm
r=1,75dm
P=π1,75²=3 1/16π dm²