Polygons - Octagons
Properties of octagons, interior angles of octagons
Polygons: Properties of Octagons | |||
Sum of the Interior Angles of an Octagon: | |||
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Regular Octagons: | |||
The properties of regular octagons: | |||
All sides are the same length (congruent) and all interior angles are the same size (congruent). To find the measure of the angles, we know that the sum of all the angles is 1080 degrees (from above)... And there are eight angles... So, the measure of the interior angle of a regular octagon is 135 degrees. | |||
The measure of the central angles of a regular octagon: | |
To find the measure of the central angle of a regular octagon, make a circle in the middle... A circle is 360 degrees around... Divide that by eight angles... So, the measure of the central angle of a regular octagon is 45 degrees. |