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2.(ii) Give a definition for each of the following terms. Are there other terms that need to be defined first? What are  they, and how might you define them? (ii) perpendicular lines 

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Yes, there are other terms that are needed to be defined first which are:

Plane: A plane is a flat surface on which geometric figures are drawn.

Point: A point is a dimensionless dot which is drawn on a plane surface.

Line: A line is the collection of n number of points which can extend in both the directions and has only one dimension.
ii) perpendicular line:-
If two lines intersect with each other and make a right angle at the point of intersection. Then, two lines are called perpendicular lines.

Posted by

Gautam harsolia

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