What is the sum of the angle measures of a 29-gon? The sum of the interior angle measures of a polygon with n sides is 180(n-2). [ Therefore the sum of the interior angle measures of a polygon with 29 sides is 180(29-2) = 180 (27) = 4860 degrees. ] This answer has been confirmed as correct and helpful.

so, 180 * 37 /39 = 170.769230769 about. the exterior angle is 180 – 170.769230769 = 9.23076923 about.

In geometry, a tetracontagon or tessaracontagon is a forty-sided polygon or 40-gon. The sum of any tetracontagon’s interior angles is 6840 degrees.

There are six angles, so 720 ÷ 6 = 120°. Each interior angle of a regular hexagon has a measure of 120°. Because the sum of these angles will always be 360°, then each exterior angle would be 60° (360° ÷ 6 = 60°).

The sum of exterior angles of a heptagon is 360 degrees. For regular heptagon, the measure of the interior angle is about 128.57 degrees.

Thus, the sum of the exterior angles will be 360°. So, for a regular 20-gon, each exterior angle is 360°/20 = 18°.

540. 360.

The sum of the exterior angles of any polygon is 360 degrees and so the sum of the exterior angles is irrespective of the number of sides.

360˚

A polygon with 23 sides has a total of 3780 degrees. total interior angles = (n – 2)180°, where n is the number of sides.

360

If the 21 sided polygon is regular, each exterior angle = 360/21 = 17 and 1/7 degrees and each interior angle = 180 – 17 and 1/7 = 162 and 6/7 degrees, and the sum of the 21 interior angles = 21 * (162.8571429) = 3420º.

Regular Polygons

The sum of the internal angle and the external angle on the same vertex is 180°. The sum of all the internal angles of a simple polygon is 180(n–2)°, where n is the number of sides.

9,906

Study Guide for the Interior Angles of Polygons