Class 9 Maths Practice Test: Circles - Circles & its Related Terms — Flashcards | Class 9 Math | FatSkills

Class 9 Maths Practice Test: Circles - Circles & its Related Terms — Flashcards

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A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius.

A circle is a plane figure bounded by one curved line, and such that all straight lines drawn from a certain point within it to the bounding line, are equal. The bounding line is called its circumference and the point, its centre.
— Euclid, Elements

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The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called __________
circle
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