Interaction between Line and Circle
Interaction between Line and Circle: Overview
This topic covers concepts such as tangent: special case of secant, circle, tangent to a circle, and circles passing through given number of points.
Important Questions on Interaction between Line and Circle
Find the distance of the chord of length , from the centre of the circle of diameter

Number of circles pass through three non-collinear points is equal to the number of circles pass through two distinct points.

Three circles pass through collinear points.

Draw a tangent at any point on the circle having radius units

The tangent to a circle is a special case of the secant when the two endpoints of corresponding chord coincide

The tangent to a circle is a special case of the secant.

is the center of the circle in the figure, and some line segments have been drawn. Find the two tangents to the circle

is the center of the circle in the figure, and some line segments have been drawn. Find the two intersecting lines of the circle

A chord is drawn of length in a circle of radius . What is the distance (in ) the chord from the centre of the circle?

A straight line which passes through two points on a circle is

If the points, are non-collinear points, then how many circles can be drawn which passes through points and ?

A straight line passing through a point on a circle is

Line segment joining the centre and any point on the circle is a radius of the circle.

The tangent to a circle is a special case of the secant, when the two end points of its corresponding chord coincide.

The lengths of two parallel chords on one side of the centre of a circle are cm and cm. If they are at a distance of cm, then the diameter of the circle will be

In the below figure is the centre of the circle.
Fill in the blank is followed by the figure on your exercise book.
The line is the _____ of the circle.

In the below figure is the centre of the circle.
Fill in the blank is followed by the figure on your exercise book.
The line segment is the _____ of the circle.

In the below figure is the centre of the circle.
Fill in the blank is followed by the figure on your exercise book.
The line segment is the _____ of the circle.

Draw a circle with radius cm with centre . Take two points and on this circle so that . From the points and draw tangents to the circle and respectively. Write the measure of .

Draw a circle of radius . taking as a centre. Take a point on this circle. Draw the radius . Draw a normal perpendicular at the point of the line segment . Is a tangent of the circle?
