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CBSE Guide Circles class 10 Notes

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10 Mathematics notes Chapter 10 Circles

Download CBSE class 10th revision notes for Chapter 10 Circles in PDF format for free. Download revision notes for Circles class 10 Notes and score high in exams. These are the Circles class 10 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the the best tips recommended by teachers during exam days.

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CBSE Class 10 Mathematics
Revision Notes
CHAPTER 10
CIRCLES

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1. Tangent to a Circle
2. Number of Tangents from a Point on a Circle
3. Miscellaneous Questions
   

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• Circle: A circle is a collection of points in a plane which are at a constant distance from a fixed point.
• Centre: The fixed point is called a centre.
• Radius: The constant distance is called the radius.
• Diameter: Twice of radius is called the diameter.
• Chord: The line joining two points on the circumference of the circle is called a chord. The longest chord is the diameter of the circle.
• Sector of a circle: The region enclosed by two radii and the corresponding arc is called a sector of the circle.
• Segment of the circle: The region bounded by an arc and the corresponding chord is called the segment of the circle.

1. Tangent to a Circle : It is a line that intersects the circle at only one point.
2. Point of contact: The common point between the circle and the tangent is called the point of contact.
3. Secant: A line which has only two points common to a circle is called the secant.
4. There is only one tangent at a point of the circle.
5. No tangent can be drawn from a point inside the circle.
6. The tangent at any point of a circle is perpendicular to the radius through the point of contact.
7. The lengths of tangents drawn from an external point to a circle are equal.

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