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Q: What is the size of an interior angle in a regular nonagon?

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

If it's a regular 9 sided nonagon then each interior angle is 140 degrees and they all add up to 1260 degrees

Each interior angle is 150 degrees

Each interior angle is 144 degrees

108'

120 degrees.

Each interior angle is 162 degrees.

Each interior angle: 1640 20' 52.17''

Each interior angle is: 1540 17' 8.57''

Each interior angle is: 1520 18' 27.69''

135 degrees

The 7 interior angles add up to 900 degrees and each interior angle is 900/7

360/9 = 40 degrees

Each interior angle of the regular 8 sided octagon measures 135 degrees

Each interior angle measures 144 degrees

176.4 degrees

Each interior angle is 144 degrees.

135 dregrees

Divide the 360 by 10

135 degrees and its exterior angle is 45 degrees

Providing that it is a regular 15 sided polygon then each interior angle will be 156 degrees

let n = number of sides Size of interior angle = 180(n-2)/n

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

thirty sixImproved Answer:-Providing that it's a regular pentagon then each interior angle will measure 108 degrees

Exterior angles are supplementary with interior angles, so 180-30=150