Popular Terms. Detailed listing of activities, costs, expected difficulties, and schedules that are required to achieve the objectives of the strategic plans. Because of the quick increase in number of employees the company I work for reviewed their implementation plan for evacuating the building if there is a fire.
Noun. 1. rectangle-a parallelogram with four right angles. foursquare, square - (geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon; you can compute the area of a square if you know the length of its sides.
A rectangle is a parallelogram with 4 right angles. Now, since a rectangle is a parallelogram, its opposite sides must be congruent and it must satisfy all other properties of parallelograms. In a rectangle, all angles are 90Â°. The diagonals of a rectangle are congruent. It's easy to prove that the diagonals of a rectangle with the Pythagorean theorem.