Question

perpendicular 【perpendicular】adj.垂直的A square has four 90-degree angles made by its four perpendicular sides.正方形的四个直角是由它四条垂直的边所作成的。

Accepted Answer

[ˌpɜːrpən'dɪkjələr] 
perpendicularintersecting at or forming right angles
Two lines that form a T are perpendicular to each other. They meet at a right angle. A person who is standing is perpendicular to the earth.
Perpendicular is used to describe lines, angles and direction. In geometry a perpendicular angle is 90 degrees, a perfect L. On a compass, East and North are perpendicular to each other. The term can be used more generally to describe any steep angle. You might talk about a ski slope that is nearly perpendicular. That's impossible; gravity would make you fall off a 90-degree angle. But if it's close enough, no one's really measuring.
All forms of 'perpendicular' will appear on average once every 803 pages.perpendicularperpendicularityperpendicularly

Front	perpendicular
Pron	[ˌpɜːrpən'dɪkjələr]
Back	【perpendicular】 adj.垂直的 A square has four 90-degree angles made by its four perpendicular sides. 正方形的四个直角是由它四条垂直的边所作成的。
Vocab	perpendicularintersecting at or forming right angles Two lines that form a T are perpendicular to each other. They meet at a right angle. A person who is standing is perpendicular to the earth. Perpendicular is used to describe lines, angles and direction. In geometry a perpendicular angle is 90 degrees, a perfect L. On a compass, East and North are perpendicular to each other. The term can be used more generally to describe any steep angle. You might talk about a ski slope that is nearly perpendicular. That's impossible; gravity would make you fall off a 90-degree angle. But if it's close enough, no one's really measuring. All forms of 'perpendicular' will appear on average once every 803 pages. perpendicular perpendicularity perpendicularly

Perpendicular Angles 90 Degree Describe ˌpɜːrpən'dɪkjələr Adj.垂直的 Square Made