15-gon??? assuming you mean a pendedecagon, here is your answer: 2,340 degrees
The sum of angles in degree = 180(n - 2), where n is the number of sides of the regular polygon. The sum of angles in degree = 180(n - 2); n = 8 The sum of angles in degree = 180(8 - 2) = 180(6) = 1,080 Angle in degree = (The sum of angles in degree)/n Angle in degree = (1,080)/8 = 135 Thus, in a regular octagon, the degree of an angle is 135.
The sum of angles of a regular polygon in degrees = 180(n - 2), where n is the number of sides of the regular polygon. So, where n = 8 the sum of angles in degree = 180(8 - 2) = 180(6) = 1,080 Angle in degree = (The sum of angles in degree)/n Angle in degree = (1,080)/8 = 135 Thus, in a regular octagon, the degree of an angle is 135.
360 degree.
360 degree
S of interior angles of ANY n-sided polygon is (2n -4) right angles, so 2 x 30 - 4 = 56, 56 x 90 = 5040 degrees
The sum of the exterior angles of any regular polygon is 360°
Yes, a regular triangle, also known as an equilateral triangle, has three angles that are each 60 degrees. In any triangle, the sum of the interior angles is always 180 degrees, and in an equilateral triangle, all angles are equal, making each one 60 degrees. Thus, a regular triangle indeed has three 60-degree angles.
Sum of angles in a regular polygon = (#sides - 2) * 180. Sum of Octagon angles = (8-2) * 180 = 1080
180 degree( 5-2) is the sum of the interior angles. Now divide this by 5 since it is regular and that tells us all the angles have the same measure.
180 DEGREE
A Regular Polygon
The sum of the exterior angles of any polygon is 360 degrees.