Questions and Answers
What is the diameter of a circle?
What is a secant?
A line that intersects a circle at exactly two points
What does congruent mean in the context of circles?
Circles with the same diameter and radius length
What are concentric circles?
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Define a circle.
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What is circumference?
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What is an arc in relation to a circle?
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What is a minor arc?
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What is a radius?
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Define a tangent.
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What is a chord?
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What is a major arc?
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Study Notes
Circle Terminology
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Diameter: A specific chord that passes through the center of a circle, representing the longest distance across the circle.
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Secant: A line that intersects a circle at precisely two points, extending infinitely in both directions.
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Congruent Circles: Circles that have identical diameters and radii, essentially being the same size.
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Concentric Circles: A set of circles that share the same center point but have different radii.
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Circle: Defined as the collection of all points in a plane that are equidistant from a fixed point, known as the center.
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Circumference: The total distance around the circle, equating to its perimeter. It can be calculated using the formula C = πd, where d is the diameter.
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Arc: Comprised of two points on a circle and the continuous curve connecting them, representing a portion of the circumference.
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Minor Arc: An arc that measures less than 180 degrees, indicating its length is shorter than half the circle.
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Radius: A segment that connects any point on the circle to the center, effectively half of the diameter.
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Tangent: A straight line that touches the circle at only one point, remaining in the same plane as the circle.
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Chord: A line segment with both endpoints lying on the circumference of the circle, can vary in length.
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Major Arc: An arc that measures more than 180 degrees, indicating its length spans greater than half the circle.
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Test your knowledge of circle geometry with these flashcards. Each card features a key term related to circles along with its definition, helping you learn important concepts such as diameter, secant, and concentric circles. Perfect for students looking to master circle-related terminology.
