Question

Select the best answer that defines the radius of a circle.

The radius is a line segment joining two distinct points on the circle.


The radius is a line segment that starts at the center of the circle and ends at a point on the circle.


The radius is the boundary of a circle.


The radius is a line segment that starts at one point on the circle, passes through the center of the circle, and ends at another point on the circle.

Answer 1

The radius is a line segment that starts at the center of the circle and ends at a point on the circle.

Explanation:

The radius is half of the diameter. The diameter is one line going across the whole, through the midpoint. The radius starts at the midpoint and that's why it's only half of the diameter.

Answer 2

Answer: The radius is a line segment that starts at the center of the circle and ends at a point on the circle.

Explanation:

• The radius of a circle is the distance from the center of the circle to any point on it.

Let's check all the options.

The radius is a line segment joining two distinct points on the circle. → Wrong.

Reason :- Radius joins center and any point on circle not any two points.

The radius is the boundary of a circle. → Wrong.

Reason :- Circumference is the boundary of circle ,

Formula for circumference C= 2π r , where r is radius .

The radius is a line segment that starts at one point on the circle, passes through the center of the circle, and ends at another point on the circle.→ Wrong.

Reason :- Its diameter that starts at one point on the circle, passes through the center of the circle, and ends at another point on the circle and it is twice of radius.

So , the best answer that defines the radius of a circle is The radius is a line segment that starts at the center of the circle and ends at a point on the circle.