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AB² = OA² - OB²
AB² = 26² - 10²
AB² = 676 - 100
AB² = 576
AB = √576
AB = 24 cm
L. Layang2 OBAC = 2 x L. Segitiga ABO
= 2 x (1/2 x OB x AB)
= 2 x (1/2 x 10 x 24)
= 2 x 120 = 240 cm²
Panjang busur BC
L. layang-layang = d1 x d2 : 2
240 = (26 x BC) : 2
BC = (240 x 2) : 26
BC = 18, 46 ≈ 18,5 cm