What is a diameter?

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Prepare for the Maryland Comprehensive Assessment Program (MCAP) Test. Use our multiple choice questions and flashcards to understand MCAP terms deeply. Hints and explanations are available for each question to help you succeed. Start your journey to test readiness today!

Multiple Choice

What is a diameter?

Explanation:
In a circle, a diameter is a segment that passes through the center and has its endpoints on the circle. It is the longest chord, and its length is twice the radius: if the radius is r, the diameter is 2r. So the description that fits is a segment through the center connecting two points on the circle, with length 2r. The other ideas describe different concepts: a segment from the center to the edge is a radius; the distance around the circle is the circumference; the intersection with the y-axis is unrelated to this circle concept.

In a circle, a diameter is a segment that passes through the center and has its endpoints on the circle. It is the longest chord, and its length is twice the radius: if the radius is r, the diameter is 2r. So the description that fits is a segment through the center connecting two points on the circle, with length 2r. The other ideas describe different concepts: a segment from the center to the edge is a radius; the distance around the circle is the circumference; the intersection with the y-axis is unrelated to this circle concept.

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