Every square is a rectangle, but not every rectangle is a square. A rectangle always has 4 right angles. So does a square, so that can be considered a rectangle. A rectangle can have sides of any length just as long as all four angles are right angles. A square however must have congruent sides. So not all rectangles are squares, only the rectangles with 4 congruent sides. In real life imagine that you are ordering flowers and you want tulips. A tulip is considered a flower, but are all flowers considered tulips?
A rectangle can be considered a parallelogram with 4 right angles. …
