Jawabanmu

2014-05-05T21:33:20+07:00
Diagonal1 = 15cm
diagonal2= 3x+2 cm
L = d1*d2/2 = 15cm*(3x+2) /2 =150cm2
3x+2 = 150/15 = 10
3x=10-2=8

x = 8/3

diagonal 2 = 3*8/3+2 = 10cm
2014-05-05T21:34:56+07:00
150=15(3x+2)/2 300=45x+30 x=6 pnjgn diagonl 3(6)+2=20 cm