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52 : 4 =13 cm
panjang diagonal lainnya:
√13² - 5²
√169 - 25
√144
= 12 cm
kalau boleh jadikan yang terbaik yah :)
s = 13
1/2*d1 = 1/2*10 = 5
maka,
d2 = 2*√13²-5²
d2 = 2*12 = 24