A.Lbelah ketupat=d1×d2:2
32=10×(x+4) :2
35×2=10x+40
70=10x+40
70-40=10x
x=30:10
x=3 cm
B. d2=x+4
=3+4
=7 cm
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A.Lbelah ketupat=d1×d2:2
32=10×(x+4) :2
35×2=10x+40
70=10x+40
70-40=10x
x=30:10
x=3 cm
B. d2=x+4
=3+4
=7 cm
35 = 1/2 . 10 . (x +4)
35 = 5(x +4)
35 = 5x +20
35 -20 = 5x
15 = 5x
x = 15/5
x = 3
Jadi, nilai x adalah 3.
b. d2 = (x +4)
= (3 +4)
= 7 cm
Jadi, panjang d2 adalah 7 cm.