The distance across a circle through its center.

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Multiple Choice

The distance across a circle through its center.

Explanation:
The distance across a circle through its center is the diameter. A diameter is a line segment with endpoints on the circle that passes directly through the center, making it the longest chord in the circle and equal to twice the radius (diameter = 2 × radius). If you know the radius, you can find the diameter easily. The other terms describe unrelated ideas: perimeter is the circle’s boundary length, decimal is just a numerical format, and trend doesn’t relate to circle geometry.

The distance across a circle through its center is the diameter. A diameter is a line segment with endpoints on the circle that passes directly through the center, making it the longest chord in the circle and equal to twice the radius (diameter = 2 × radius). If you know the radius, you can find the diameter easily. The other terms describe unrelated ideas: perimeter is the circle’s boundary length, decimal is just a numerical format, and trend doesn’t relate to circle geometry.

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