alleryThe radius of a circle is 6 cm. The length of the tangent from a point 10 cm from the centre is
A8 cm
B10 cm
C6 cm
D4 cm
Answer & Solution
Correct answer: A. 8 cm
1. Tangent length squared = 10 squared minus 6 squared = 100 minus 36 = 64.
2. Tangent length = 8 cm.
3. Hence option A.
_Source: syllabus Mathematics, Ch 10 "Circles", §10.3_
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