Question

The chord of a circle of radius 10 cm subtends a right angle at its centre. The length of the chord (in cm) is ______.

विकल्प

• `5/sqrt(2)`

• `5sqrt(2)`

• `10sqrt(2)`

• `10sqrt(3)`

Answer 1

The chord of a circle of radius 10 cm subtends a right angle at its centre. The length of the chord (in cm) is `underlinebb(10sqrt(2))`.

Explanation:

`AB = sqrt(OA^2 + OB^2)`

= `sqrt(10^2 + 10^2)`

= `10sqrt(2)  cm`