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384 = 1/2 x d1 x 3/4d1
384 x2 = 3/4 d1 kwadrat
768 = 3/4 x d1 kwadrat
d1 kwadrat = 768 x 4 : 3
d1 = akar 1024
d1 = 32 cm
d2 = 3/4 x d1 = 3/4 x 32 = 24 cm
sisi miring = 16 kwadrat + 12 kwadrat= 256 + 144 = 400
s = akar 400 = 20
Keliling belah ketupat = 4 x s = 4 x 20 = 80