Question

Layang-layang KLMN, luasnya 297 cm2. Panjang KO 11cm sedangkan NO:OL=4:5. Tentukan panjang NO dan OL berturut - turut ?

Answer 1

Km = 11 x 2
     = 22
D₂  = ( 4a + 5a)
     = 9a
luas = D₁ x  D₂ : 2
297  = 22 x 9a : 2
297  = 11 x 9a
297  = 99a
297/99 = a
     3    = a
maka pajang masing-masing
NO = 4 x 3 = 12 cm
OL = 5  x 3 = 15 cm

Answer 2

Km = ko x 2 = 11x2 = 22cm

1/2 x Da x Db = 297
       km x NL = 297 x 2
      22cm x NL = 594
  NL = 594/22 = 27cm

No : Ol = 4x : 5x

No+OL = NL
4x+5x = 27
9x = 27
x= 27/9= 3

No= 4x = 4(3) = 12cm
OL = 5x= 5(3) = 15cm