Main content
Course: 4th grade > Unit 11
Lesson 5: Classifying geometric shapesQuadrilaterals review
Review the following quadrilaterals: parallelogram, trapezoid, rhombus, rectangle, and square. Then, try some practice problems.
Quadrilateral Summary
Name | Definition | Example |
---|---|---|
Quadrilateral | ||
Parallelogram | ||
Trapezoid | Exactly | |
Rectangle | ||
Rhombus | ||
Square |
To learn more about each shape and practice identifying them, keep reading!
What is a quadrilateral?
A quadrilateral is a sided closed figure.
These figures are quadrilaterals:
These figures are NOT quadrilaterals:
The figure is not closed.
The figure has sides
The
Practice set 1: Identifying quadrilaterals
Want to learn more about quadrilaterals? Check out these videos:
Types of quadrilaterals
Quadrilateral properties
Classifying quadrilaterals
Types of quadrilaterals
Quadrilateral properties
Classifying quadrilaterals
What is a parallelogram?
A parallelogram is a quadrilateral with pairs of parallel sides. In these figures, sides of the same color are parallel to each other.
Practice set 2: Identifying parallelograms
What is a trapezoid?
A trapezoid is a quadrilateral with exactly .
What is a rectangle?
A rectangle is a quadrilateral with right angles.
What is a rhombus?
A rhombus is a quadrilateral with equal sides.
What is a square?
A square is a quadrilateral with equal sides and right angles.
Practice set 7: Pulling it all together
Want to try more problems like this? Check out these exercises:
Identify quadrilaterals
Quadrilateral types
Categorize quadrilaterals
Identify quadrilaterals
Quadrilateral types
Categorize quadrilaterals
Want to join the conversation?
- why can a square be a rectangle but a rectangle can not be a square.(130 votes)
- So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus every square is a rectangle because it is a quadrilateral with all four angles right angles. However not every rectangle is a square, to be a square its sides must have the same length.(85 votes)
- can 10 people vote this up please(108 votes)
- yes do the same to this comment(16 votes)
- is there a way that a rectangle can be a square without cutting it(6 votes)
- yes, well technically a square is a type of rectangle(29 votes)
- how can a square be a rectangle it is just a square in't it(4 votes)
- A rectangle is just a shape that has four right (90 degree) angles and four sides where opposite sides are parallel. There’s also a special type of rectangle that also has all of the sides be the same length. We call that special type of rectangle a “square”.
I hope this helps!(34 votes)
- it seems that a rhombus cannot be a rectangle without being a square is that true?(16 votes)
- Yes, you are correct. Good job!(12 votes)
- Hi
Why can a square be a rectangle but a rectangle can’t be a square(15 votes)- Hi the reason why a rectangle cant be a square is that a square has 4 sides and 4 right angles and NEEDS to have equal sides and a rectangle can have 4 sides 4 right angles and doesnt need to have equal sides i hope this helps(6 votes)
- why can a square be a rectangle but a rectangle cant be a square?(9 votes)
- Because squares have 4 sides like a rectangle but squares have 4 EQUAL sides. Rectangles have 2 pairs of parallel sides.(5 votes)
- if a square is a rhombus , then why can't a rhombus be a square, they look the same.(9 votes)
- Because some one sat on it and ruind the anguls(4 votes)
- Why do the shapes have the same sides but mean different things(10 votes)
- because the shapes you were talking about fits the rules for your 'different things'(3 votes)
- what if a parallelogram is not having parallel 2 sides but only one side parallel then which shape would it be?(3 votes)
- I guess that it might be called a trapezoid then.(1 vote)