Which statement about circle geometry is true?

Which statement about circle geometry is true?

• A. The radius is the distance around the circle
• B. A circle has four sides
• C. The circumference is the distance from the center to a point on the circle
• D. The diameter is the distance across the circle through the center

Answer: (D)

In circle geometry, it’s important to keep straight what each measure represents. The diameter is the distance across the circle that passes through the center, connecting two points on the circle. It’s the longest possible chord, and its length is twice the radius. The radius is the distance from the center to any point on the circle. The circumference is the distance all the way around the circle, not from the center to a point. A circle has no sides—the boundary is a smooth curve. So the statement that the diameter is the distance across the circle through the center is true because it exactly describes the line that runs straight through the middle from one edge to the opposite edge. The other descriptions mix up radius with circumference or incorrectly claim the circle has sides.

In circle geometry, it’s important to keep straight what each measure represents. The diameter is the distance across the circle that passes through the center, connecting two points on the circle. It’s the longest possible chord, and its length is twice the radius.

The radius is the distance from the center to any point on the circle. The circumference is the distance all the way around the circle, not from the center to a point. A circle has no sides—the boundary is a smooth curve.

So the statement that the diameter is the distance across the circle through the center is true because it exactly describes the line that runs straight through the middle from one edge to the opposite edge. The other descriptions mix up radius with circumference or incorrectly claim the circle has sides.