" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
πr1²:πr2²=r1²:r2²
=9²:15²
=81:225
=9:25
πr^2 : πr^2
9^2 : 15^2
81 : 225
9 : 25
π dicoret