sisäkulmiin

Sisäkulmiin is a Finnish term that translates to "interior angles" in English. It refers to the angles formed on the inside of a polygon, where two adjacent sides meet. In any polygon, the sum of the interior angles is dependent on the number of sides it possesses. For a convex polygon with n sides, the sum of the interior angles can be calculated using the formula (n-2) * 180 degrees. For example, a triangle (n=3) has an interior angle sum of (3-2) * 180 = 180 degrees. A quadrilateral (n=4) has an interior angle sum of (4-2) * 180 = 360 degrees. Each individual interior angle in a regular polygon, where all sides and angles are equal, can be found by dividing the total sum by the number of sides: [(n-2) * 180] / n. Understanding interior angles is fundamental in geometry for analyzing shapes, calculating areas, and solving various geometric problems. The concept applies to both simple and complex polygons, forming a cornerstone of geometric study.