Oikeapuolinen

Oikeapuolinen is a Finnish term that translates to "right-sided" or "equilateral" in geometry. It is most commonly used to describe a triangle. An oikeapuolinen triangle is a triangle where all three sides are of equal length. This means that all three interior angles are also equal, each measuring 60 degrees. Because all sides are equal, an oikeapuolinen triangle is a special case of an isosceles triangle (which has at least two equal sides) and an equilateral triangle.

In Finnish, the term "oikeapuolinen" literally breaks down into "oikea" meaning "right" or "correct" and "puolinen" meaning "sided" or "half". While "right" can sometimes imply perpendicularity in English geometry, in the context of "oikeapuolinen," it refers to equality or correctness of all sides. Therefore, "oikeapuolinen kolmio" specifically denotes an equilateral triangle. The properties of such a triangle are well-defined and have been studied extensively in Euclidean geometry. Its symmetry and regular shape make it a fundamental building block in various mathematical and physical contexts.