Lines on a plane that never meet. They are always the same distance apart. Here the red and blue line segments are parallel.

an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight line

Octigon

In geometry, a branch of mathematics, perpendicular lines are defined as two lines that meet or intersect each other at right angles (90°)

An acute angle ("acute" meaning "small") is an angle smaller than a right angle. The range of an acute angle is between 0 and 90 degrees.

triangle

Something that will go on and on forever and never tuch

An acute angle ("acute" meaning "small") is an angle smaller than a right angle. The range of an acute angle is between 0 and 90 degrees.

pentagon

In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints. A closed line segment includes both endpoints, while an open line segment excludes both endpoints; a half-open line segment includes exactly one of the endpoints

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Hexagon

On side has a endpoint and the other side will just keep going on and on and never touch anything

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