Download CBSE Class 10 Mathematics Circles Notes Set A in PDF format. All Revision notes for Class 10 Mathematics have been designed as per the latest syllabus and updated chapters given in your textbook for Mathematics in Standard 10. Our teachers have designed these concept notes for the benefit of Grade 10 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 10 Mathematics for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 10 Mathematics given our website

## Circles Class 10 Mathematics Revision Notes

Class 10 Mathematics students should refer to the following concepts and notes for Circles in standard 10. These exam notes for Grade 10 Mathematics will be very useful for upcoming class tests and examinations and help you to score good marks

### Circles Notes Class 10 Mathematics

**Class-X**

** Chapter 10: Circles**

** Top Definitions **

1. A tangent to a circle is a line that intersects the circle only at one point.

2. The common point of the circle and the tangent is called point of contact.

3. The length of the segment of the tangent from the external point P and the point of contact with the circle is called the length of the tangent.

4. Pythagoras theorem: In a right triangle, square of the hypotenuse is equal to the sum of the square of the other two sides.

** Top Concepts**

**1**. A tangent to a circle is a special case of the secant when the two end points of the corresponding chord coincide.

** 2**. There is no tangent to a circle passing through a point lying inside the circle.

** 3**. There are exactly two tangents to a circle through a point outside the circle.

** 4**. At any point on the circle there can be one and only one tangent.

** 5**. The tangent at any point of a circle is perpendicular to the radius through the point of contact.

** 6**. The lengths of the tangents drawn from an external point to a circle are equal.

** 7**. The center lies on the bisector of the angle between the two tangents.

**8**. There can be infinite number of chords passing through a point which is inside the circle

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