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2( p+14) = 4*17
2p+ 28 = 68
2p = 68 - 28
2p = 40
p = 40 : 2
p = 20 cm
Luas = p * l
= 20 *14
luas = 280 cm2
Keliling p panjang = 2(p+l)
68 = 2 (p+14)
34 - 14 = p
p = 20
Luas p panjang = pxl = 20x14 = 280