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If all of its exterior angles are 90 degrees then it will have 4 sides

Q: What is the number of sides of the polygon is its exterior angles is 90 degrees?

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The sum of the exterior angles of any polygon, regardless of the number of sides, is always 360 degrees. Therefore, the sum of the exterior angles of a 21-sided polygon is 360 degrees.

It is not.The sum of the exterior angles of EVERY polygon is 360 degrees, so the number of sides has no role.

The sum of the exterior angles of a polygon with ANY number of sides, is 360 degrees.

The sum of the exterior angles of any polygon is 360 degrees. If the polygon is regular then each exterior angle is 360 divided by the number of sides, so in this case each angle will be 10 degrees.

The exterior angles of any polygon are as many as their sides.

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The sum of the exterior angles of any polygon, regardless of the number of sides, is always 360 degrees. Therefore, the sum of the exterior angles of a 21-sided polygon is 360 degrees.

It is not.The sum of the exterior angles of EVERY polygon is 360 degrees, so the number of sides has no role.

The sum of the exterior angles of a polygon, with any number of sides, is 360 degrees.

The sum of the exterior angles of a polygon with ANY number of sides, is 360 degrees.

The sum of the exterior angles of a polygon with ANY number of sides, is 360 degrees.

There can be no such polygon. The sum of the exterior angles of ANY polygon is 360 degrees. If it is a regular polygon, then the number of angles MUST divide 360 degrees. Since 18.95 does not divide 360, there cannot be such a polygon. If the exterior angle was 18.94737... degrees, it would be a 19-sided polygon.

Interior angles: 2520 degrees Exterior angles: 360 degrees

They add up to 360 degrees, as do the exterior angles of a polygon with any number of sides.

The sum of the exterior angles of a polygon, with any number of sides (or vertices) is always 360 degrees.

The sum of the exterior angles of any polygon is 360 degrees. If the polygon is regular then each exterior angle is 360 divided by the number of sides, so in this case each angle will be 10 degrees.

The exterior angles of any polygon are as many as their sides.

The sum of the exterior angles of a polygon is 360 degrees. If it is a regular polygon, then it has 360/4 = 90 vertices and so 90 sides.