" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a=0,75b
2a+2b=42
------------------
2*0,75b+2b=42
3,5b=42
b=12cm
a=0,75b=0,75*12=9cm
p=√(12²+9²)=√(144+81=√225=15cm