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Story Transcript
DIGITAL TEXT BOOK
Standard IX
MATHEMATICS CIRCLE MEASURES
CONTENTS
1. Basic Information....................... 2. Circle and Polygons.................... 3. Diameter and Perimeter............ 4. A new number.............................. 5. Area............................................... 6. Length and Angle........................ 7. Angle and Area............................
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Basic Information Circle
A circle is a closed two dimensional figure in whichthe set of all the points in the plane is equidistanfrom a given point called "centre"
Radius
A segment whose endpoints are the centre of a circle and a point on thecircle.
Diameter The diameter is the length of the line through the centre that touches twopoints on the edge circle