Radius of a circle is 10 cm. Distance of chord PQ from the centre is 8 cm. What is the length of chord PQ?
Answer & explanation
Correct answer: option 3
The length of chord is 2√(\( { r}^{2 } \) - \( { d}^{2 } \))
= 2\(\sqrt {100\;-\;64 }\) = 2\(\sqrt { 36}\) = 12 cm.