NCERT Solutions for Mathematics Constructions

NCERT 9th class Mathematics book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 9 Mathematics chapter wise NCERT solution for Maths textbook for all the chapters can be downloaded from our website and myCBSEguide mobile app for free.

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NCERT Solutions Chapter 11: Constructions

In earlier chapters, the diagrams, which were necessary to prove a theorem or solving excercise were not necessarily precise. They were drawn only to give you a feeling for the situation and as an aid for proper reasoning. However, sometimes one needs an accurate figure, for example - to draw a map of a building to be constructed, to design tools, and various parts of a machine, to draw road maps etc. To draw such figures some basic geometrical instruments are needed. You must be having a geometry box which contains the following:
(i) A gradusted scale, on one side of which centimetres and millimetres are marked off and on the other side inches and their parts are marked off.
(ii) A pair of set - squares, one with angles {tex}90^\circ ,\,60^\circ \,and\,30^\circ {/tex} and other with angles {tex}90^\circ ,\,45^\circ \,and\,45^\circ . {/tex}.
(iii) A pair of dividers (or a divider) with adjustments.
(iv) A pair of compasses (or a compass) with provision of fitting a pencil at one end.
(v) A protractor.