You might think this one is a no-brainer. Squares are rectangles. But a lot of people have trouble remembering this simple rule:
Squares are always rectangles
Rectangles are not always squares.
So, let’s start from the beginning.
What is a rectangle?
A rectangle is a quadrilateral, which means it has four sides.
But beware! Not all quadrilaterals are rectangles.
A rectangle is a parallelogram, which means it’s made up of two pairs of parallel lines.
But once again, you can be tricked here – since not all parallelograms are rectangles!
A rectangle also has four, and only four, 90 degree angles.
And that’s it!
A square has all of those things:
90 degree angles
To be a square, all four sides must be the same length.
A square is always a rectangle
A rectangle is not always a square.
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