Chapter 3:Pair of Linear Equations in Two Variables

Chapter 5: Arithmetic Progression

Chapter 8: Introduction to Trigonometry

Chapter 9:Some Applications of Trigonometry

Chapter 12:Area Related to Circles

Circles

There can be infinit tangents to a circle.

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

(ii) A line intersecting a circle in two points is called a ………….

(iii) A circle can have …………… parallel tangents at the most.

(iv) The common point of a tangent to a circle and the circle is called …………

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

(ii) A line intersecting a circle in two points is called a secant.

(iii) A circle can have two parallel tangents at the most.

(iv) The common point of a tangent to a circle and the circle is called the point of contact.

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

(A) 12 cm (B) 13 cm (C) 8.5 cm (D) √119 cm

In ΔOPQ

OQ^{2} = OP^{2}+PQ^{2}

(12)^{2 }= 5^{2}+PQ^{2}

PQ^{2} = 144-25

PQ^{2} = 119

PQ = √119 cm

So, option D is correct

other, a secant to the circle.

Let AB be line such that

AB∥CD∥EF.

CD is a secant , EF is a tangent intersecting the circle at H.