Jawabanmu

2014-05-18T21:15:06+07:00
K = 2(p+l)
170 = 2(3+2)
170 = 2.5
170 = 10
170/10 = 17

p = 3.17 = 51
l = 2.17 = 34

L=p.l
  = 51.34
  = 1734

maaf kalau salah:)
2014-05-18T21:19:00+07:00
170 = 2 × 3x + 2 × 2x
170 = 6x + 4x
170 = 10x
x    = 17

p = 17 × 3 = 51 cm
l = 17 × 2 = 34 cm

L = 51 × 34 = 1734 cm²


Maaf kalau ada kesalahan