Rectangles

Do you remember what kind of shape a rectangle is? 🤔

Yes, a quadrilateral! ✅

A **rectangle** is a special kind of quadrilateral.

👉 It is special because it has four right angles.

Remember that a right angle measures exactly 90°. It is usually shown with a small square like this:

How can you tell if a quadrilateral is a rectangle? 🤔

Look at the quadrilateral and ask yourself if you can fit a small square in each of the angles. Each small square tells us that it is a right angle.

Let's try it!

Is this quadrilateral a rectangle?

You can only fit two small squares in the angles of this quadrilateral.

So, this is **not** a rectangle. ❎

Let’s try a few more! 🤗

Is this quadrilateral a rectangle?

Yes! This is a rectangle. We can fit a small square in each of the angles. This quadrilateral has 4 right angles and is a rectangle.

Good job! ✅

One more!

Is this quadrilateral a rectangle?

That’s right! This is not a rectangle! This quadrilateral has only 2 right angles. We know that rectangles must have 4 right angles.

Great job! 🤗 You can now identify rectangles!

💪 Now, you can move on to practice!

Teachers:

Password-Free Login!🧚♀️

Scannable **auto login passes** make it easy for your students to login anywhere (even young learners on shared devices).

2,500+ Effective Self-Paced Lessons

Step-by-step, adaptive, mobile-friendly lessons written to grade help students learn (and relearn) Common Core skills with less effort.

Time-Saving Teacher Tools

Turn your old printables and papers into self-grading worksheets that auto assign extra work for students who fail! Even create your own adaptive quizzes. Access all tools without limits.

Question Bank

View and build off over 2.5k+ lessons, 20k+ questions, and 200+ self-grading worksheets in the growing community library.

Student Analytics

Review student progress from the teacher profile.

Assignment Tools

Set a schedule of lessons. Student progress auto-syncs for Google Classroom users.

Trusted by over 100k students, parents, and teachers each month.

Parent

Teacher

Up to 5 students

$39.99 / Year

$6.99 / Month$3.33 / Month

You save $43.89 with the annual plan

7 day free trial