Kehäpituutta

Kehäpituutta refers to the circumference of a circle. It is the distance around the outside edge of a circular object. The formula for calculating the circumference (C) of a circle is dependent on either its radius (r) or its diameter (d). When the radius is known, the formula is C = 2πr, where π (pi) is a mathematical constant approximately equal to 3.14159. When the diameter is known, the formula is C = πd, as the diameter is twice the radius (d = 2r).

The concept of kehäpituutta is fundamental in geometry and has numerous practical applications. For example, it is used in calculating the length of a track around a circular field, determining the amount of material needed to create a circular frame, or estimating the distance traveled by a wheel in one rotation. Understanding kehäpituutta is crucial in fields such as engineering, architecture, and navigation. The relationship between the circumference and the diameter of any circle is always constant, a ratio that has fascinated mathematicians for centuries.