Circles | Introduction to Tangent and Secant to a Circle | CBSE Class 10.

http://www.learncbse.in/ncert-class-10-math-solutions/

The following video defines the tangent of a circle.

00:03 CBSE solutions for class 10 maths circles Ex 10.1 Q1. How many tangents can a circle have ?

00:19:DEFINATION OF TANGENT TO A CIRCLE:

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

01:30 Conclusion:There are infinite number of tangents to a circle.

01:50 CBSE class 10 maths chapter 10 Circles Ex 10.1 Q2. Fill in the blanks:

(i) A tangent to a circle intersects it in point (s).

02:15 DEFINATION OF TANGENT TO A CIRCLE:

02:30 Conclusion:There is only one tangent at a point of the circle.

02:37 (ii) A line intersecting a circle in two points is called a _____________ .

02:41 DEFINATION OF SECANT TO A CIRCLE:

02:57 (iii) A circle can have parallel tangents at the most.

03:08 Explanation:There are only two parallel tangents to agiven circle.

03:56 (iv) The common point of a tangent to a circle and the circle is called ____________ .

04:08 The common point of the tangent and the circle is called the point of contact

The tangent is said to touch the circle at the common point.

04:14 Solutions for CBSE Class 10 Maths Chapter 10 Q3. A tangent PQ at a point P of a circle of radius 5 cm meets a line through the centre O at

a point Q so that OQ = 12 cm. Length PQ is:

(A) 12cm (B) 13cm (C) 8.5cm (D) Jjj cm.

05:32 Tangent Theorem:The tangent to a circle is perpendicular to the radius through the point of contact.

06:06 Phythagoras Theorem:In a right angle triangle,hypotenuse Square is equal to sum of squares of other two sides.

07:31 NCERT solutions for CBSE class 10 maths circles Q4. Draw a circle and two lines parallel to a given line such that one is a tangent and the

other, a secant to the circle.

08:20 Tangent to a circle drawn parallel to a given line.

08:35 Secant to a circle drawn parallel to a given line.

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CBSE solutions for class 10 maths circles Ex 10.1

CBSE class 10 maths chapter 10 Circles Ex 10.1

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CBSE Class 10 Maths Solutions Circles

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NCERT solutions for CBSE class 10 maths circles

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