What is the definition of a circle

The video tutorial introduces the concept of a circle, comparing it to a parabola. It explains that a parabola is a set of points equidistant from a focus and a directrix. The focus then shifts to circles, defining them as a set of points equidistant from a center point. The tutorial emphasizes understanding the definition and properties of circles, encouraging students to write down the definitions for better comprehension.

Describe the relationship between the focus and directrix in a parabola.

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What is the definition of a parabola as described in the text?

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Explain the concept of equidistance in relation to a circle.

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What is the center of a circle and how is it defined?

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Summarize the definition of a circle provided in the text.

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