Jawabanmu

2014-08-18T21:10:01+07:00
Panjang slidde = ps = 5
lebar slidde = ls = 4
panjang bayangan  = pb = ?
lebar bayangan = lb = 6
⇔ ps/pb = ls/lb
 = 5/pb = 4/6
 = 4 x pb = 5 x 6
 = 4 x pb = 30 
 = pb = 30/ 4 =7.5

⇔luas bayangan = pb x lb
 = 7.5 x 6 = 45

4 3 4