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d1 = 4x
d2 = 3x
d = diagonal
Luas = (d1 x d2)/2
600 = 12x²/2
600 = 6x²
x² = 100
x = 10
d1 = 40
d2 = 30
cari dulu panjang sisi miring belah ketupat = √15²+20² = 25
maka Keliling = 4 x 25 cm = 100 cm
600=1/2 x 4x x 3x
1200=12x²
100=x²
10=x
K=4 x(√40²+30²)
=4 x(√1600+900
=4x (√2500)
=4x50
=200 cm