Tangents and Secant of a Circle

Draw a tangent at any point $P$ on the circle having radius $3$ 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.

The angle between a tangent to a circle and the radius drawn at the point of contact is

A chord is drawn of length $6 \mathrm{cm}$ in a circle of radius $5 \mathrm{cm}$. What is the distance (in $\mathrm{cm}$) the chord from the centre of the circle?

In the given figure $PQ$ and $RS$ are two parallel tangents to a circle with centre $O$ and another tangent $AB$ with point of contact $C$ intersecting $PQ$ at $A$ and $RS$ at $B$. Then $\angle AOB=$_____$°$.

The length of the tangent to a circle from a point $17 \mathrm{cm}$ from its centre is $8 \mathrm{cm}$. Find the radius of the circle (in $\mathrm{cm}$).

In the following figure, point $‘A’$ is the centre of the circle. Line $MN$ is tangent at point $M$. If $AN=12 \mathrm{cm}$ and $MN=6 \mathrm{cm}$, determine the radius of the circle in $\mathrm{cm}$. $\left(\sqrt{3}=1.73\right)$

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

A point $P$ is $25 \mathrm{cm}$ from the centre $O$ of the circle. The length of the tangent drawn from $P$ to the circle is $24 \mathrm{cm}$. Find the radius of the circle (in $\mathrm{cm}$).

Two concentric circles are of radii $5 \mathrm{cm}$ and $3 \mathrm{cm}$. Find the length of the chord of the larger circle which touches the smaller circle in $\mathrm{cm}$.

From a point $Q$, the length of the tangent to a circle is $24 \mathrm{cm}$ and the distance of $Q$ from the centre is $25 \mathrm{cm}$. The radius of the circle is

A straight line passing through a point on a circle is

From a point $Q$ the length of the tangent to a circle is $24 \mathrm{cm}$ and the distance of $Q$ from the centre is $25 \mathrm{cm}$. Find the radius of circle in $\mathrm{cm}$.

A circle with centre $O$ touches all the four sides of a quadrilateral $ABCD$ internally in such a way that it divides $AB$ in $3:1$ and $AB=12 \mathrm{cm}$, then find the radius of circle where $OA=15\mathrm{cm}$.

In the figure given above, $M$ is the centre of the circle and $KL$ is a tangent segment. $L$ is a point of contact. If $MK=12, KL=6\sqrt{3}$, then find the 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.

In the following figure, $\mathrm{PQ}$ and $\mathrm{PR}$ are tangents to the circle, with centre $\mathrm{O}.$ If $\angle \mathrm{QPR} = 60°,$ calculate $\angle \mathrm{QOR}.$

In a triangle $\mathrm{ABC},$ the incircle with centre $\mathrm{O}$ touches $\mathrm{BC}, \mathrm{CA}$and $\mathrm{AB}$ at points $\mathrm{P},$ $\mathrm{Q}$ and $\mathrm{R}$ respectively. Calculate $\angle \mathrm{QOR}$, given that $\angle \mathrm{A} = 60°.$

In the following figure, $\mathrm{PQ}$ is the tangent to the circle at $\mathrm{A}, \mathrm{DB}$ is the diameter and $\mathrm{O}$ is the centre of the circle. If $\angle \mathrm{ADB} = 30°$ and $\angle \mathrm{CBD} = 60°,$ calculate $\angle \mathrm{PAD}.$