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DeanR

The 23 exterior angles add to 360. The interior angles are supplements of the exterior angles.

180 - 360/23 = 3780 / 23 = 164.3478...

Answer: a

The measure of one interior angle of a regular 23-gon is 164.3°

The sum of interior angles in a polygon is given by the formula

[tex]S = (n-2)180^{o}[/tex]

Where [tex]S[/tex] is the sum of the interior angles

and [tex]n[/tex] is the number of sides

To find the measure of one interior angle in a regular polygon, we divide the sum of the interior angles by the number of sides. That is,

Measure of one interior angle in a regular polygon = [tex]\frac{(n-2)180^{o} }{n}[/tex]

From the question, we are to determine the value of one interior angle of a regular 23-gon.

A regular 23-gon has 23 sides

∴ [tex]n = 23[/tex]

From the formula

Measure of one interior angle in a regular polygon = [tex]\frac{(n-2)180^{o} }{n}[/tex]

Measure of one interior angle in the regular 23-gon = [tex]\frac{(23-2)180^{o} }{23}[/tex]

= [tex]\frac{(21)180^{o} }{23}[/tex]

= [tex]\frac{3780^{o} }{23}[/tex]

= 164.3478°

164.3°

Hence, the measure of one interior angle of a regular 23-gon is 164.3°

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