Name shapes, big or small
Seeing that a triangle is still a triangle at any size is an early step in your child's understanding of what makes a shape what it is. In kindergarten your child will also name shapes that are turned or tilted, and in 1st and 2nd grade they will describe shapes by their sides and corners. Much later, scale drawings and maps rest on the same insight: changing the size does not change the shape.
In this video, your child will learn to name shapes, big or small.
The lesson stops at each question for your child's answer.
Three problems, each a little harder
Each problem is worked step by step. Your child will solve the last one before Bobby shows how.
Example 1
What shape is the small one?
Example 2
What shape is the small one?
Your child's turn
What shape is the big one?
The two key steps
- 1Count the sides.
- 2Big or small, it has the same name.
Mistakes to listen for
- Calling a tiny square a "little box" or a huge circle a "ball," not seeing the same shape at a new size.
- Calling every four-sided shape a square, including a long, thin rectangle like a door.
- Naming a triangle at a familiar size but guessing when it is much larger, such as a play tent.
The lesson shows every step, so your child sees why it works. Read our parent's guide to naming shapes whatever their size →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
Join the clubMore kid-friendly lessons
More Pre-K Geometry, with questions your child answers along the way.
Questions parents ask
Does my child need an account to watch?
No. You can watch this on any device at any time. If your child would like to practice naming shapes whatever their size, and you'd like parent-friendly reports on your child's progress and growth, you can join Bobby's Math Club for unlimited free practice.
What happens when my child answers a question?
A right answer gets a cheer, and the lesson carries on. If your child isn't sure, they can tap "I don't know yet", and Bobby gives the answer and shows another example. Nothing is scored or stored.
Is this the same lesson that's on YouTube?
Yes. Here, the lesson stops at each question and waits for your child to answer. On YouTube, each question stays on screen for a few seconds, and then the lesson plays on.
Where can I learn more?
There's a short, kid-friendly lesson like this one for every Pre-K to 5th grade math skill, all in our video library. Our parent's guide to naming shapes whatever their size has more on where kids get stuck and how you can help at home. In the club, your child practices at just the right level, about five minutes a day, and you get parent-friendly reports as they grow. Learn more about how it works →
Practice naming shapes whatever their size
Questions at your child's level, about five minutes a day, on naming shapes whatever their size and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
Join the club