By A Mystery Man Writer
All squares are rectangles. Not all rectangles are squares. A quadrilateral is a rectangle if all four internal angles are 90^@. A quadrilateral is a square if all four internal angles are 90^@ and all four sides are equal in measure. Note that the first condition for a square is the same as the only condition for a rectangle, and thus all squares are rectangles. However, there is no condition which requires a rectangle to have four equal sides, and thus not all rectangles are squares. For example: The above is a rectangle, as all four angles are 90^@, but is not a square, as the two vertical sides are shorter than the two horizontal sides.
Lesson Explainer: Areas of Rectangles and Squares
Draw rectangular shapes with the Rectangle tool
Is a Square a Rectangle? Yes or No? — Mashup Math
Area of a Rectangle, Area of Rectangle = Length × Breadth
Diagonals of Parallelograms, Rectangles, and Rhombi (Video & Practice)
Square vs Rectangle - Differences & Similarities
Area of squares, rectangles and compound shapes - KS3 Maths - BBC Bitesize
Special Parallelograms: Rhombus, Square & Rectangle - Properties
How do I use the Rectangle tool?
Can a square be called a rectangle? - Quora
Question Video: Determining If a Square Is a Rectangle
All rectangles are squares, but not vice versa.