Parallelogram - An Euclidean geometry shape, the parallelogram consists of 4 sides, forming 2 parallel pairs. The angles opposite to each other are the same, the sides in pairs are of the same length. The name comes from the Greek παραλληλ-όγραμμον, meaning literally a shape made of parallel lines.
|d1 = √(a² + 2 * a * b* cosα + b²)|
|d2 = √(a² - 2 * a * b* cosα + b²)|
|Perimeter = 2 * a + 2 * b|
|Area enclosed (A) = a*h|