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"