" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
πr² = 81π /:π
r² = 81 /√
r = 9
πr² = 25π /:π
r² = 25 /√
r = 5
d = 10
l = 2πr
2πr = 12π /:2π
r = 6
Mam nadzieje , że jest dobrze.