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MrRamon
Perpendicular lines are defined as two intersecting lines that meet at a 90 degree angle. Without the understanding off what an angle is, or how it is measured, the concept of perpendicular lines is not going to be understood.
asharoot

Answer:

Here is the sample response !!

In order for two lines to be perpendicular, they have to intersect at a ninety- degree angle. The term angle would have to be defined before perpendicular lines because it is used in the definition. A definition for perpendicular lines is insufficient if the term angle is not defined first.

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