The distance from the center of a circle to any point on its circumference.

The distance from the center of a circle to any point on its circumference.

• A. Area
• B. Radius
• C. Quotient
• D. Equivalent

Answer: (B)

That distance is called the radius. A circle is defined as all points at the same fixed distance from its center, so any segment from the center to the edge has that same length. The radius is that common length, and all radii in a circle have equal length. The other terms describe different concepts: area is the amount of space inside the circle, a quotient is the result of division, and equivalent means two things have the same value but doesn’t refer to a distance. Knowing that the radius is half the diameter and related formulas like circumference = 2πr helps connect this concept to other circle properties.

That distance is called the radius. A circle is defined as all points at the same fixed distance from its center, so any segment from the center to the edge has that same length. The radius is that common length, and all radii in a circle have equal length. The other terms describe different concepts: area is the amount of space inside the circle, a quotient is the result of division, and equivalent means two things have the same value but doesn’t refer to a distance. Knowing that the radius is half the diameter and related formulas like circumference = 2πr helps connect this concept to other circle properties.