Perpendicular lines are lines that meet at a right angle. This means that the two lines form a 90-degree angle. You can think of a right angle as a corner of a square or a rectangle.
Here is a picture of two perpendicular lines:
You can also use a protractor to measure the angle between two lines. If the angle measures 90 degrees, then the lines are perpendicular.
The ladder was leaning against the wall at a perpendicular angle.
Adjective:
Noun:
The word "perpendicular" comes from the Latin word "perpendiculum", which means "plumb line". The first recorded use of the word "perpendicular" in English was in the 14th century.
What does perpendicular mean?
Address
Developing Experts Limited
Exchange Street Buildings
35-37 Exchange Street
Norwich
NR2 1DP
UK
Phone
01603 273515
Email
[email protected]
Copyright 2025 Developing Experts, All rights reserved.
Unlock expert-designed lessons, resources, and assessments tailored for educators. No credit card required.
Claim Your Free Trial →
