" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
P=4pi cm²
P=pi r²
pi r²=4pi
r²=4
r=2 cm
l=2 pi r
l=2*pi *2
l=4 pi cm
wiec
4 pi = pi r kwadrat
4 * 3,14 = 3,14 * r kwadrat
4 = r kwadrat
r = 2
mamy juz promien
długosc to 2 pi r
dł = 2 * 3,14 * 2 = 12,56 centymetrow
r= 2πcm
l=2πr
l= 2 *π * 2πcm= 4π₂cm = 4*3,14(do kwadratu)cm= 4 * 9,8596 cm≈39,4 cm