Q:

What are the different types of lines?

A:

The main types of lines are horizontal lines, vertical lines, perpendicular lines and parallel lines. Other categories of lines include diagonal lines, curved lines, contour lines and continuous lines.

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Five types of lines are typically used in geometry:

• Vertical lines run straight up and down and have an undefined slope.
• Horizontal lines run straight across and have a slope of zero.
• Perpendicular lines intersect each other at a 90-degree angle. They occur when horizontal and vertical lines meet.
• Parallel lines are two straight lines that never intersect.
• Skew lines are special lines that exist in three or more dimensions and are nonparallel lines that never intersect.

Two types of lines are typically used in drawing:

• A contour line is a single line that creates the outline of a figure and shows height and width.
• Continuous lines in drawing are created when an image is drawn using only one line.
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