Geometryhard · Past Paper
Two circles of radii 10 cm and 8 cm intersect and their common chord is 12 cm long. Find the distance between their centers.
A8 + sqrt(7)
B13.3 cm
C15 cm
D18 cm
✓ Correct Answer: B — 13.3 cm
Distance = sqrt(10^2 - 6^2) + sqrt(8^2 - 6^2) = 8 + sqrt(28) approx 8 + 5.29 = 13.29 cm.
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