Two unique lines intersecting each various other at 90° or a appropriate angle are called perpendicular lines.
You are watching: Perpendicular lines intersect to form four right angles
Example:
Here, abdominal is perpendicular to XY because abdominal muscle and XY crossing each various other at 90°.
Non-Example:
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| The 2 lines room parallel and also do no intersect each other. They have the right to never be perpendicular to each other. | The two lines room intersecting each other at an acute angle. So, they room not perpendicular. | The lines are not intersecting each other at appropriate angles. |
Properties the perpendicular lines
These lines constantly intersect at ideal angles.
If two lines room perpendicular come the very same line, they room parallel to every other and will never intersect.
Adjacent sides of a square and also a rectangle are constantly perpendicular to each other.
Sides the the right-angled triangle enclosing the best angle are perpendicular to each other.
Real life examples
We have the right to observe many perpendicular currently in actual life. Some examples are edge of 2 walls and the Red overcome symbol.
Fun Facts The native ‘perpendicular’ has actually its beginning from the late middle English i m sorry exactly method “at appropriate angles”, from Latin ‘perpendicularis’, ‘perpendiculum’ an interpretation “plumb line” and also from ‘perpendere’ where ‘per’ means “through” and ‘pendere’ means “to hang”. The perpendicular currently are always intersecting lines however intersecting lines are not constantly perpendicular to every other. |