suorakaide
Suorakaide, in geometry, is the rectangle. It is a four-sided polygon with all interior angles equal to 90 degrees. A rectangle is a type of parallelogram: opposite sides are parallel and equal in length.
Key properties include that the diagonals are equal in length and bisect each other, and all four
If the adjacent sides have lengths a and b, the area is A = a × b and
A rectangle becomes a square when a = b; in that case all sides are equal and the
In practical terms, rectangles model many everyday shapes and are common in design, architecture, computer graphics,