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| Introduction |
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| Geometrical figures help us to understand various geometrical concepts. When we prove geometrical propositions by logical reasoning, we draw only a rough figure and we do not need to take accurate measurements but geometrical constructions have to be drawn accurately to the given measurements. They are used by scientists, artists and engineers. These constructions are done using ruler and compass only. |
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| Constructions are to be drawn by using ruler and compass only. |
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| It must be stressed that not all constructions are possible using a compass and straight edge alone. |
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