" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(luasx2)/d1
=(90x2)/9
=180/9
=20 cm
luas=d1.d2/2
90=9.d2/2
90.2/9=d2
20=d2
jadi d2 nya 20 cm