What is the relationship between two perpendicular lines? What are some examples?

1 Answer
Zor Shekhtman
Nov 20, 2015

All four angles formed by two perpendicular lines are measured 90^o90o.

Explanation:

By definition, perpendicular lines are those that intersect at right angle.

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The definition requires only one angle (out of four formed by two intersecting lines) to be the right angle (that is, measure at 90^o90o). Obviously, all others are also measure 90^o90o since an angle adjacent to one measured 90^o90o must complement it to a straight angle of 180^o180o and, hence, must be 90^o90o itself.

Example of perpendicular lines:

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