Jawabanmu

2014-05-19T20:33:25+07:00
La = s²
La = 6²
La = 36 cm²

LΔ = 4 × 1/2 × 6 × 9
LΔ = 2 × 6 × 9 
LΔ = 108 cm²

Lp = 36 + 108 = 144 cm²