A four-sided polygon having exactly one pair of parallel sides. The two sides that are parallel are called the bases of the trapezoid. The sum of the angles of a trapezoid is 360 degrees.
Examples:
Pentagon
A five-sided polygon. The sum of the angles of a pentagon is 540 degrees.
Examples:
A regular pentagon:
| An irregular pentagon:
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Hexagon
A six-sided polygon. The sum of the angles of a hexagon is 720 degrees.
Examples:
A regular hexagon:
| An irregular hexagon:
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Heptagon
A seven-sided polygon. The sum of the angles of a heptagon is 900 degrees.
Examples:
A regular heptagon:
| An irregular heptagon:
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Octagon
An eight-sided polygon. The sum of the angles of an octagon is 1080 degrees.
Examples:
A regular octagon:
| An irregular octagon:
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