alleryTwo tangents from an external point to a circle of radius 6 cm have length 8 cm each. The distance of the external point from the centre is
A14 cm
B12 cm
C10 cm
D8 cm
Answer & Solution
Correct answer: C. 10 cm
1. Right triangle: tangent = 8, radius = 6, distance to centre = hypotenuse.
2. d squared = 64 + 36 = 100.
3. d = 10 cm.
_Source: syllabus Mathematics, Ch 10 "Circles", §10.3_
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