Circles

A circle is a collection of points that are equidistant from the center point. It is not a polygon because it does not have three or more sides!

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Parallel Lines

Parallel lines are lines that are always the same distance apart from one another, and no matter how far they are extended, they never cross. Parallel lines have the same slope, and can be drawn in any direction.

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Types of Angles

There are five basic types of angles (based on angle measurements), two pairs of angles that have special properties, vertical angles (when angles are drawn by crossing lines), and adjacent angles.

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Triangles

A triangle is a polygon with three sides. There are several types of triangles which are based either on the length of the sides, or on the size of the angles.

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