Jawabanmu

2014-05-20T18:47:17+07:00
K = 2×(p+l)
K = 2×(8+7)
K = 2×(15)
K = 30 cm
2014-05-20T18:51:19+07:00
Keliling persegi : 2 (p + t) = 2 (15) = 30 cm