Jawabanmu

2014-05-28T13:16:39+07:00
K= 4s
s=104/4=26

*1/2 d2=x
x²= 26²-24²
x=10

d2=2x=20

L=1/2 d1 d2
=1/2 20.48
=480 cm²
bner gk tu? .-.
2014-05-28T14:20:32+07:00
Keliling - 4 x s
104 = 4x s
s = 26 cm
Diagonal 2 : phytagors ( 5,12,13 ) 
10,24,26 ( 5x2, 12x2,13x2 )
jadi Diagonal 2 nya : 20 cm 
Luas = 20 x 26 : 2 = 260 cm2
salah2 , luasnya : 20 x 48 : 2 = 4800 cm2 ( maap ya )