Jawabanmu

2014-08-31T17:44:02+07:00
A. K = (3x-2)+x+(2x+2) cm
= 3x+x+2x
= 6x
b. K = 6x
48 = 6x
x = 48:6 = 8
c. Panjang sisi:
1. 3x-2 = (3.8)-2 = 22 cm
2. x = 8 cm
3. 2x+2 = (2.8)+2 = 18 cm

Jadi keliling = 22+8+18 = 48 cm