" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2πr=10π/:π
2r=10
r=10:2
r=5
pole=πr²=π×5²=25πj.²
b]
½×2πr=3π/:π
r=3
2πr=2π×3=6π