Jawabanmu

2014-06-03T15:10:22+07:00
Pakenya aturan phytagoras yak.
20 =  \sqrt{ (3y)^{2}+ (4y)^{2}  }  \\ 400 =  9y^{2}+ 16y^{2} \\ 400=25y^{2} \\ 16= y^{2} \\ 4=y