Question

A circle has
A. 10 sides
B. 20 sides
C. 300 sides
D. Infinite sides

Answer 1

Hint: A circle is round in shape with no corners or vertices. A circle is a \[2\]-D (two dimensional) figure.

Complete answer:
A circle is a curved figure with no lines on its boundary. The sides of a circle can be determined by taking two points on the circumference of the circle and then joining these points.
This implies that the circle has infinite such sides. The sides of the circle here do not refer to sides on a circle but sides inside the circle. The way sides of circle has been determined is shown below:

The sides that can be drawn by connecting two points on a circle are called chords.
The longest chord of a circle is its diameter which is twice the radius of the circle and passes through the centre of the circle. The radius of the circle is determined by connecting the centre of the circle with any point on the circumference of the circle.
The sides cannot be drawn outside the circle by joining two points but there is a type of side called secant which is both inside and outside of the circle.
Another type of side that does not intersect the circle is tangent. The tangent touches the circle at a single point and makes an angle of $90{}^\circ $ with the radius of the circle at the point of contact with the circle.

Therefore, we can conclude that option (D) is correct.

Note:
A circle is a continuous curved polygon with no sides on its boundary due to which it is said that the circle has zero edges, zero vertices and only one face.