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Q: What is the size of one interior angle in a regular decagon?

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If it is a regular 12 sided polygon then each interior angle is 150 degrees.

exterior angle = 360° ÷ 20 sides = 18° interior angle = 180° - exterior angle = 180° - 18° = 162°

150 degrees each

Interior angles are 108o. 360 - 108 = 252o for each exterior angle * * * * * Each exterior angle is 360/5 = 72 degrees, NOT 252. The 108 for the interior angle is correct, but to get from interior to exterior you subtract from 180, not 360!

It can be any size at all, between zero and 360 degrees.If the nonagon is regular, then the angle measures 140 degrees.

Related questions

Each interior angle is 144 degrees.

Divide the 360 by 10

What is the sum of interior angle for polygon with 60 sides.

Each interior angle measures 144 degrees

A ten-sided polygon. The sum of the angles of a decagon is 1440°. so 1440°÷10=144° ---------------------------------------------------------------------------- The easiest way to calculate this is to calculate the exterior angle and use the fact that the exterior and interior angles are supplementary. Sum exterior angles = 360° → Each exterior angle of a regular decagon is 360° ÷ 10 → Each interior angle of a regular decagon = 180° - 360° ÷ 10 = 144°

In a general decagon an interior angle can have any value in the range (0, 360) degrees - excluding 180 degrees. The only constraint is that the sum of all interior angles must be 1440 degrees.

Each interior angle is 150 degrees

108'

Each interior angle measures 140 degrees

120 degrees.

Each interior angle is 162 degrees.

Each interior angle: 1640 20' 52.17''

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