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Square Circle

 ABCD is a square.  A circle is a closed plane figure.
 It also has 4 sides: A D  It is made up of only one
AB, BC, CD and DA. Side curved line. O

 It has 4 vertices: Vertex  It has no vertex or side.
A, B, C and D. B C  O, the point inside the
 Each side of a circle is called the centre of the

square is equal in length. circle.
Here, AB = BC = CD = DA.  From the centre every point lying on
the circle is at equal distance.

Note
Quick Check  A square is a rectangle but a rectangle is not a
square.
Name any 3 objects, which are  The longer side of the rectangle is called the length
circular in shape around you. and the shorter side is called the breadth.
_____, ______, ______.  The length and the breadth of a square are equal,
i.e., the sides of a square are equal.
diaGonalS

Look at the given rectangle. Its vertices A and C are joined with a dotted A D
line. Similarly, vertices B and D are also joined with a dotted line. Line
segments AC and BD are the diagonals of rectangle ABCD.

Thus, the diagonal is a line segment that joins two vertices of a shape B C

that are not next to each other.
A D P S

B Rectangle C Q Square R
The diagonals AC and BD of a The diagonals PR and QS of a square
rectangle are equal in length. are equal in length.

activity
Read the instructions given below and join the dots to make the figures.

 A square joining only 8 dots and colour it yellow.
 A rectangle joining only 10 dots and colour it red.
 A triangle joining only 9 dots and colour it blue.

1. Now, try to draw the diagonals in each of the above figures.
2. In which figure are you unable to get the diagonal?

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