The second method is to use the formula: sum of interior angles = (𝒏 – 2) × 180. This gives (10 – 2) × 180 = 1440 Image caption, Find the sum of the interior angles of a 26-sided polygon.

times 180^\circ\) where \(n\) is the number of sides. All the interior angles in a regular polygon are equal. The formula for calculating the size of an interior angle is: interior angle of a ...

Archimedes determined the upper and lower range of pi by finding the perimeters of inscribed and circumscribed polygons. By doubling the number of sides of the hexagon to a 12-sided polygon ...

times~{3}~=~540^\circ\) The number of triangles in each polygon is two less than the number of sides. The formula for calculating the sum of interior angles is: \(({n}~-~{2})~\times~180^\circ ...