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प्रश्न
Give a definition of the following term. Are there other terms that need to be defined first? What are they, and how might you define them?
perpendicular lines
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उत्तर
Yes, we need to understand terms like point, line, ray, angle, plane, circle, and quadrilateral before defining the required terms.
Two lines in the same plane, p and q, are considered perpendicular if they make a right angle and are written as p ⊥ q.

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संबंधित प्रश्न
Consider two ‘postulates’ given below:-
- Given any two distinct points A and B, there exists a third point C which is in between A and B.
- There exist at least three points that are not on the same line.
Do these postulates contain any undefined terms? Are these postulates consistent? Do they follow from Euclid’s postulates? Explain.
If a point C lies between two points A and B such that AC = BC, then prove that AC = `1/2` AB. Explain by drawing the figure.
In the following figure, if AC = BD, then prove that AB = CD.

In how many points two distinct planes can intersect?
In how many lines two distinct planes can intersect?
Given three distinct points in a plane, how many lines can be drawn by joining them?
The number of dimension, a point has ______.
The edges of a surface are curves.
Read the following axioms:
- Things which are equal to the same thing are equal to one another.
- If equals are added to equals, the wholes are equal.
- Things which are double of the same thing are equal to one another.
Check whether the given system of axioms is consistent or inconsistent.
The following statement is true or false? Give reason for your answer.
A terminated line can be produced indefinitely on both the sides.
