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.

## Keep Learning

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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## Related Questions

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The phrase "perpendicular lines intersect to form right angles" can be turned into an if-then statement by saying: If perpendicular lines intersect, then the lines form right angles. It can also be phrased as: If two lines form right angles, then the lines are perpendicular.

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To spot a fake Ticketmaster ticket, examine the vertical lines that border it for the name Ticketmaster in very small print and look at its bar code for incomplete or jagged lines. Ticketmaster tickets are printed on high-quality paper and feature microprinting and real time bar codes as anti-fraud measures.

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Basic standard genograms, also called family diagrams, use squares to signify males, circles for females, horizontal lines to represent family relationships within a generation and vertical lines to represent parent-child connections. In relationships, males are placed on the left, females are placed on the right and children are ordered by age, with the oldest to the left.