A rectangle has four straight sides and four square corners.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Square corners
A square corner is the kind you see where a wall meets the floor. Not squashed, not leaning.
Long and short
Usually two sides are long and two are short. A door is a rectangle. So is this page.
A square is a rectangle too
A square has four straight sides and four square corners, so it fits the rule. It is a rectangle where all four happen to match.
Why so many things are rectangles
Rectangles stack and fit together with no gaps. That is why doors, books and bricks are made that way.
Step 2: Try It Yourself
Tap and try it out.
Rectangle
Straight sides
4
Corners
4
A rectangle has 4 sides and 4 square corners.
Turning it does not change what it is.
Step 3: Watch an Example
One step at a time.
Watch Bo Look at a Door
Bo looks at the door.
- Step 1
It has four straight sides.
Step 4: Your Turn
Practice makes it stick.
The Book
Problem 1 of 1
How many sides does a rectangle have?
Four Sides
1 of 3
How many corners does a rectangle have?
2 of 3
Is a door a rectangle?
3 of 3
How many long sides does a rectangle have?
Step 5: Quick Check
Show what you know.
Question 1 of 1
How many sides does a rectangle have?
What You Learned
- A rectangle has four sides.
- Two are long and two are short.
- Doors and books are rectangles.