## CBSE Class 10 Maths Chapter 10 – Circles – Free PDF Download

Free PDF download of Class 10 Maths Chapter 10 – Circles Revision Notes & Short Key-notes prepared by expert Mathematics teachers from latest edition of CBSE(NCERT) books.

You can also Download __Maths NCERT Solutions Class 10__ to help you to revise complete Syllabus and score more marks in your examinations.

**CBSE Class 10 Maths Revision Notes Chapter 10 Circles**

**Tangent to a Circle****Number of Tangents from a Point on a Circle****Miscellaneous Questions**

**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.

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