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sisi : 52 / 4 = 13 cm
diagonal 1 = 10 cm
10 :2 = 5
tripel pythagoras : 13, 5, 12
diagonal 2 = 2 x 12 = 24
L. Belah Ketupat :
d1 x d2 / 2
= 10 X 24 / 2
= 120 cm persegi.
52 = 4s
s = 52/4 = 13 cm
Panjang diagonal BD = 12.2 = 24
L belah ketupat = 1/2 d1 . d2
= 1/2 . 10 . 24
= 5 . 24
L belah ketupat = 120 cm²