K-5 friendly lesson
One small step at a time.Read the idea, try the activity, and celebrate each win as you go.
Classify squares, rectangles, rhombuses, and parallelograms
It's a shape party! 🎉 These four-sided shapes are all related, like a family. Let's learn their family secrets and how to tell them apart!
Do this: Read the concept below, then try the quiz or activity.
Lesson 192 of 220
Concept
These shapes are all special types of quadrilaterals (four-sided polygons) and they are also all parallelograms. A parallelogram is a shape with two pairs of parallel sides.
Meet the Family:
* Parallelogram (The Parent Shape):
* Rule: Has two pairs of opposite sides that are parallel (they never cross, like railroad tracks).
* The opposite sides are also equal in length.* Rhombus (The Tilted Square):
* Rule: It's a parallelogram, but all four sides are equal in length.
* It doesn't need to have square corners. Think of a diamond.* Rectangle (The Boxy Shape):
* Rule: It's a parallelogram, but it has four right angles (perfect square corners).
* The opposite sides are equal, but not necessarily all four sides.* Square (The Perfect One):
* Rule: The square is the superstar! It's a parallelogram, AND it's a rhombus, AND it's a rectangle.
* It has four equal sides (like a rhombus).
* It has four right angles (like a rectangle).Key Idea: Think of it like a family tree. All of these shapes are parallelograms. A square is special because it fits the rules for being a rectangle AND a rhombus. This means a square can be called a rectangle, and a square can also be called a rhombus!
Try it
Practice: Classify squares, rectangles, rhombuses, and parallelograms.