" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
d²=Luas÷π
d²=1256÷3,13
d²=400
d=√400
d=20 cm
4πr² = 1256
4x3,14xr² = 1256
12,56 r² =1256
r² = 1256/12,56
r² =100
r = 10
d=10x2 = 20 cm²