Pw-Pole wycinka (nie pisz tego)
a) px = α/360 πr²
więc 3π= 30/360πr² I :π
3= 30/360r² I 30/360
3 *360/30 =r²
r²= 36 I √
r=6
b) 3/2π =240/360πr² I :π
3/2 = 240/360r² I :240/360
3*360/240*2 = r²
1080/480=r²
r² = 2,25 I √
r= 1,5
c) 2π= 72/360 πr² I :π
2=72/360r² I :72/360
2*360/72=r²
r²=10 I √
r=√10
