From an external point Q, the length of the tangent to a circle is 5 cm and the distance of Q from the centre is 8 c... | MCQ 1m | Maths | SuperPadhai

Circles > Question

MCQ1 markYear: 2020EasyCBSE Class 10

circlestangentpythagoras

Question

From an external point

Q

, the length of the tangent to a circle is 5 cm and the distance of

Q

from the centre is 8 cm. The radius of the circle is

Solution

1

r = 8^{2} - 5^{2} = 64 - 25 = 39

cm

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