Answers

2015-02-09T20:16:00+08:00
A line is perpendicular to another if it meets or crosses it at right angles (90°).
It is also means "at Right angle"

0
2015-02-09T20:28:46+08:00
In elementary geometry, the property of beingperpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a right angle.
0