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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_07\Chap_07
                 \ 10-Nov-2025  Bharat Arora   Proof-8                                     Reader’s Sign _______________________ Date __________

                how to draw a Circle

                A circle can be  drawn simply  by  tracing the outline  of circular objects  like  a coin,

                bangle, cup, etc. To draw a circle with a given radius, we use a pencil, a compass,

                and a ruler.

                example 1. Draw a circle of radius 3 cm.

                 Step 1. Place  the  pointed  end of the               Step 2. Place  the  pointed  end of the
                            compass at the 0 mark of the                         compass on the paper and hold
                            ruler.  Stretch  the other  arm of                   the upper end firmly. Rotate the
                            the compass to the 3 cm mark                         pencil arm keeping the pointed
                            on the ruler.                                        arm fixed.

                                                                                                          Centre of
                                                                                                          the circle

                Now, using a compass, make the following design.
                            Step 1.                       Step 2.                            Step 3.

                You can also try other designs of your choice.

                Relationship between the Radius and diameter of a Circle

                The diameter of a circle is two times the radius.

                                                       Diameter = 2 × Radius

                If we know the length of the radius of a circle, we can find the length of its diameter

                and vice versa.

                       126       Mathematics 4

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