The angle subtended by a chord xy on the centre of a circle is 180°. If the length of this chord is 36 cm, then what will be the radius of this circle?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 18 cm.
The diameter of a circle can only subtend an angle of 180° at the centre of the circle.
XY has to be the diameter of the circle.
Radius of the circle = 36/2 = 18 cm