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PARTS OF A CIRCLE To understand and apply the vocabulary

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Circumference Diameter The circumference of a circle is the distance around the outside of a circle The diameter of the circle is the distance from one side to the other passing through the centre of the circle

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Radius Chord A chord is a line touching the circumference of the circle at two points The radius is the line connecting the centre of the circle and the circumference

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Sector Arc A sector is the part of a circle between two radii and an arc An arc is the part of the circumference at the edge of a sector

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Segment Tangent A segment is the part of a circle between a chord and an arc A tangent is a straight line which touches a circle at one point only

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RadiusDiameterSectorSegment TangentArcCircumferenceChord Copy the two diagrams carefully Label your two diagrams using the words below

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Diameter Circumference The distance around the outside of a circle The distance from one side to the other passing through the centre of the circle Chord Radius Sector Arc Part of the circumference at the edge of a sector Segment Tangent The part of a circle between two radii and an arc A straight line which touches a circle at one point only The part of a circle between a chord and an arc The line connecting the centre of the circle and the circumference A line touching the circumference of the circle at two points Match up the word with the correct definition.

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