diketahui suatu ABCD jajargenjang AB = 3× - 1 CD = 2× - 4 BC = 2y + 3 AD = 5y - 6 Hitunglah keliling jajargenjang tersebut ?
Matematika
jeanne4
Pertanyaan
diketahui suatu ABCD jajargenjang
AB = 3× - 1
CD = 2× - 4
BC = 2y + 3
AD = 5y - 6
Hitunglah keliling jajargenjang tersebut ?
AB = 3× - 1
CD = 2× - 4
BC = 2y + 3
AD = 5y - 6
Hitunglah keliling jajargenjang tersebut ?
1 Jawaban
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1. Jawaban TrisnaMPutri
AB=3x-1
CD=2x-4
3x-1 = 2x-4
3x-2x = -4+1
x = -3
AB=3(-3)-1 CD=2(-3)-4
=-9-1 =-6-4
=-10 =-10
BC=2y+3
AD=5y-6
2y+3 = 5y-6
2y-5y = -6-3
-3y = -9
y = -9/3
y = 3
BC=2(3)+3 AD=5(3)-6
=6+3 =15-6
=9 =9
K=2(AB+BC)
=2(-10+9)
=2((-1))
=-2
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