Panjang suatu persegi panjang adalah (2x+3) cm dan lebar (x-1) cm. tentukan keliling persegi panjang yang dinyatakan dalam x. jika x = 7, hitung lah keliling nya
Shahnazaf
Karena x=7 P = 17 L = 6 Keliling = 2(P+L) = 2(17+6) =2(23) =46
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nathanaelta35
Diketahui p = (2x + 3) cm l = (x - 1) cm x = 7
Ditanya: Keliling
K = 2 [p + l] K = 2 [(2x + 3) + (x - 1)] K = 2 [2x + 3 + x - 1] K = 2 [3x + 2] K = 2 [3(7) + 2] K = 2 [21 + 2] K = 2 [23] K = 46 cm
P = 17
L = 6
Keliling = 2(P+L)
= 2(17+6)
=2(23)
=46
p = (2x + 3) cm
l = (x - 1) cm
x = 7
Ditanya: Keliling
K = 2 [p + l]
K = 2 [(2x + 3) + (x - 1)]
K = 2 [2x + 3 + x - 1]
K = 2 [3x + 2]
K = 2 [3(7) + 2]
K = 2 [21 + 2]
K = 2 [23]
K = 46 cm