Question

if the length of a chord is equal to that of the radiusof the circle then the angle subtended in radians at the centre of the circle by chord is

Answer 1

If the length of chord is equal to the radius of circle, an equilateral triangle will be formed by joining them.

So, Central angle = 60°

= 60 × pi / 180

$= \frac{\pi}{3}$

Answer 2

If the length of chord is equal to the radius of circle, an equilateral triangle will be formed by joining them.

So, Central angle = 60°

= 60 × pi / 180

= \frac{\pi}{3}=

3

π