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Chapter 11- Constructions Interview Questions Answers

In Class IX, you have done certain constructions using a straight edge (ruler) and a
compass, e.g., bisecting an angle, drawing the perpendicular bisector of a line segment,
some constructions of triangles etc. and also gave their justifications. In this chapter,
we shall study some more constructions by using the knowledge of the earlier
constructions. You would also be expected to give the mathematical reasoning behind
why such constructions work.
Division of a Line Segment
Suppose a line segment is given and you have to divide it in a given ratio, say 3 : 2. You
may do it by measuring the length and then marking a point on it that divides it in the
given ratio. But suppose you do not have any way of measuring it precisely, how
would you find the point? We give below two ways for finding such a point.



Chapter 11- Constructions Contributors


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