Introduction
What do these shapes have in common?
Goal:
Goal:
Do you know what a playing card, a baseball diamond, and a picture frame all have in common? They are all quadrilaterals! The word itself may sound complicated, but its meaning is not.
A quadrilateral is any four-sided shape that has straight edges or sides and is two-dimensional. Look at the images above; they are all quadrilaterals!
Take a look around you, and see if you can identify other objects that fit the description of a quadrilateral. Write down everything you can identify.
| Your Responses | Sample Answers |
|---|---|
| Great finds! Quadrilaterals are everywhere. | |
Now that you know “quadrilateral” is a term used to describe any four-sided shape that has straight sides, take a minute to think where you might have worked with shapes of this type before. Click the answer button to reveal one possible answer.
If the description of quadrilaterals sounds familiar, it's because you have worked with quadrilaterals before! Squares, rectangles, and parallelograms are all quadrilaterals that you have graphed on the coordinate plane. For example, this diagram shows a graphed parallelogram.
