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5. In the grid given below, draw two different types of quadrilaterals.

6. A rhombus has been divided into four triangles. Which of these shapes can you
form using all 4 pieces? Try and find out.

a. Square b. Rectangle
c. Triangle d. Pentagon (5-sided)
e. Hexagon (6-sided) f. Octagon (8-sided)

7. Make the following shapes using all 7 pieces of the tangram.

a. T-shirt b. Zero c. Fish d. Man
e. One f. Cat g. Rocket

CIrCleS

A circle is a simple closed curve in which every
point is equidistant from a fixed point inside it.
The fixed point is called the centre of the circle.
Coins, bangles, CDs, etc. are some examples of

circles. A circle has different parts, each with a
special name.
Radius (OC)
• Centre: The fixed point inside the circle Circumference C

which is at an equal distance from all Centre
the points on the circle is called the (O)
centre. Here, point O is the centre of
the circle. A B
Diameter O
• radius: The distance from the centre (AB) Q
to any point on the circle is called the
radius. A circle can have an infinite
P
number of radii of equal measure. Chord (PQ)
Radii is the plural of radius. Here, OC is a radius of the circle.

128 Mathematics 5