" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
25=4a² +a²
25=5a² /5
5=a²
a=√5
Obw.=2a+ 2*2a
Obw.=2*√5+2*(2*√5)
Obw.=2√5+4√5
Obw.=6√5