MATHS [3 marks sum]

In this four sided closed figure all the sides are equal and each angle is 90°. This figure is called a square.
In ABCD, AB = BC = CD = DA and ∠A = ∠B =∠C = ∠D = 90°

A circle is given with centre P and PA = PB = radius of the circle.

∵ The radii of a circle are equal there they lie on the circumference of the circle In other words, path of a point which is equidistant from a fixed point is the circumference of a circle. The fixed point is called the centre and equidistance is the radius.

If three or more lines pass through a common point, these are called concurrent lines. Below is given the figure, in which three lines AB, CD and EF are passing (or intersecting each other) at O.

We take a point O on a piece of paper. Using a sharp pencil, we draw a line OA through O.

another line OB is drawn as shown in the figure.
We can draw an infinite number of lines from O as we know that an infinite number of lines can be drawn
through a point in aplane,

(i) A, B and C are three collinear points.
(ii) A, D and C are non-collinear points.
(iii) AC and DE are intersecting lines.