Rectangle

A rectangle is a quadrilateral with four right angles. Its opposite sides are equal and parallel, and its diagonals are equal in length and bisect each other.

Quadrilateral: A polygon with four sides and four angles. A rectangle is a quadrilateral whose four angles are right angles.
Rectangle diagonal: A line segment joining opposite vertices of a rectangle. The two diagonals have equal lengths and bisect one another.
Square: A quadrilateral with four equal sides and four right angles. A square is a rectangle with the additional condition that all sides are equal.
Cartesian coordinate system: A coordinate framework that locates points using perpendicular axes. Axis-aligned rectangles can be specified by their coordinate bounds.
Right angle: An angle measuring 90 degrees. Four right angles distinguish rectangles from most other quadrilaterals.
Pythagorean theorem: A theorem stating that a right triangle’s hypotenuse squared equals the sum of its legs squared. It gives a rectangle’s diagonal length from its side lengths.
Parallelogram: A quadrilateral whose opposite sides are parallel. Rectangles are parallelograms with four right angles.
Bounding box: A smallest or convenient box enclosing a geometric object or data item. Rectangular bounds describe image regions and spatial objects efficiently.
Parallel lines: Lines in a plane that never meet, however far extended. Each pair of opposite rectangle sides lies on parallel lines.
Area: A measure of the two-dimensional size of a region. A rectangle’s area is the product of its length and width.

Linked from 15 pages