When two lines cross and make a 90 degree angle.
Think of the shape of a capital T now think of the left side with an, A. in the middle a, B and the right side with a, C and the top of the upside down T with an A
The segment AB is perpendicular to the segment CD Because the two angles it created is 90 degrees.
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No, a pentagon is not perpendicular. The word perpendicular describes two lines (or line segments) that meet at a 90o angle.
Perpendicular lines intersect each other at right angles which is 90 degrees.
They meet perpendicularly. Perpendicular lines meet at a 90 degrees angle.
C.intersecting lines
A rhombus has parallel lines but no perpendicular lines.