" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
P=4πr²
6,25π=4πr² |:4π
1,5625=r² |√
r=1,25
4*pir^2=6,25pi /:4pi
r^2=1,5625
r=1,25
r2=6,25/pi=2,5