Odpowiedź :
L=2*pi*r
L=25.12
25,12=2*3.14*r
6.28r= 25.12 //: 6.28
r = 4
P=PI r[2]
P=3.14* 4[2]
P=3.14 *16
P=50.24 [j]kwadratowych
L=25.12
25,12=2*3.14*r
6.28r= 25.12 //: 6.28
r = 4
P=PI r[2]
P=3.14* 4[2]
P=3.14 *16
P=50.24 [j]kwadratowych
l = 2πr = 25,12m
r = l ÷ 2π = 25,12 ÷ (2 × 3,14) = 4m
P = πr² = 3,14 × (4m)² = 50,24m²
pozdr ;)
r = l ÷ 2π = 25,12 ÷ (2 × 3,14) = 4m
P = πr² = 3,14 × (4m)² = 50,24m²
pozdr ;)