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Sector of a circle (view source)

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==Concept #2 Radius and Diameter==

[[File:rad_dia.jpg|200px|right]]

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~~''RADIUS:A straight line drawn from centre to the circumference''<br>~~

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~~''DIAMETER:A straight line drawn through the centre and terminated both ways by the circumference.''~~

===Learning objectives===

# Radius is a straight line joining centre of a circle to any point on the circumference.

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