Look around you! Shapes are everywhere. The top of your desk is a rectangle. A coin is a circle. A slice of sandwich cut diagonally is a triangle. A carom board is a square.
These are all flat shapes (also called 2D shapes). They have length and width, but no thickness.
Let us learn about four important 2D shapes!
What are Sides and Corners?
A side is a straight line that forms part of a shape. A corner (also called a vertex) is the point where two sides meet.
The Four Shapes
| Shape | Sides | Corners | Special Feature |
|---|---|---|---|
| Circle | 0 (curved line) | 0 | Perfectly round, no straight sides |
| Triangle | 3 | 3 | Three straight sides |
| Square | 4 | 4 | All 4 sides are equal |
| Rectangle | 4 | 4 | Opposite sides are equal |
Circle
A circle is a round shape with no sides and no corners. A bangle, a wheel, and a plate are all shaped like circles.
Triangle
A triangle has 3 sides and 3 corners. The word "tri" means three. A samosa, a traffic sign, and a slice of pizza are shaped like triangles.
Square
A square has 4 equal sides and 4 corners. A chessboard, a tile on the floor, and a biscuit can be square-shaped.
Rectangle
A rectangle has 4 sides and 4 corners. The opposite sides are equal. A book, a door, and a blackboard are shaped like rectangles.
Shapes in Everyday Life
| Shape | Things Around Us |
|---|---|
| Circle | Coin, bangle, clock face, plate, wheel |
| Triangle | Samosa, traffic sign, roof of a hut |
| Square | Carom board, floor tile, handkerchief |
| Rectangle | Book, door, blackboard, mobile phone |
A shape has 3 sides and 3 corners. What shape is it?
It is a triangle.
How many sides does a rectangle have? A rectangle has 4 sides.
How is it different from a square? In a rectangle, only the opposite sides are equal. In a square, all 4 sides are equal.
Neha sees a round clock on the wall. What shape is the clock face?
The clock face is a circle.
| Word | Meaning |
|---|---|
| 2D shape | A flat shape with length and width only |
| Side | A straight line that forms part of a shape |
| Corner (Vertex) | The point where two sides meet |
| Circle | A round shape with no sides or corners |
| Triangle | A shape with 3 sides and 3 corners |
| Square | A shape with 4 equal sides and 4 corners |
| Rectangle | A shape with 4 sides (opposite sides equal) and 4 corners |
Shape Hunt: Walk around your house and find objects that match each shape. Write the name of the object next to the shape.
1. Circle: _________________________________________
2. Triangle: _______________________________________
3. Square: ________________________________________
4. Rectangle: ______________________________________
Now draw a picture using only circles, triangles, squares, and rectangles (for example, a house, a train, or a robot).
Want to use this as a worksheet? Switch to the A4 printable view.
Look around you! Shapes are everywhere. The top of your desk is a rectangle. A coin is a circle. A slice of sandwich cut diagonally is a triangle. A carom board is a square.
These are all flat shapes (also called 2D shapes). They have length and width, but no thickness.
Let us learn about four important 2D shapes!
What are Sides and Corners?
A side is a straight line that forms part of a shape. A corner (also called a vertex) is the point where two sides meet.
The Four Shapes
| Shape | Sides | Corners | Special Feature |
|---|---|---|---|
| Circle | 0 (curved line) | 0 | Perfectly round, no straight sides |
| Triangle | 3 | 3 | Three straight sides |
| Square | 4 | 4 | All 4 sides are equal |
| Rectangle | 4 | 4 | Opposite sides are equal |
Think about it: A square has 4 equal sides. A rectangle also has 4 sides, but only the opposite sides are equal. Can a square also be called a rectangle? Yes, it can!
Circle
A circle is a round shape with no sides and no corners. A bangle, a wheel, and a plate are all shaped like circles.
Triangle
A triangle has 3 sides and 3 corners. The word "tri" means three. A samosa, a traffic sign, and a slice of pizza are shaped like triangles.
Square
A square has 4 equal sides and 4 corners. A chessboard, a tile on the floor, and a biscuit can be square-shaped.
Rectangle
A rectangle has 4 sides and 4 corners. The opposite sides are equal. A book, a door, and a blackboard are shaped like rectangles.
Shapes in Everyday Life
| Shape | Things Around Us |
|---|---|
| Circle | Coin, bangle, clock face, plate, wheel |
| Triangle | Samosa, traffic sign, roof of a hut |
| Square | Carom board, floor tile, handkerchief |
| Rectangle | Book, door, blackboard, mobile phone |
| Word | Meaning |
|---|---|
| 2D shape | A flat shape with length and width only |
| Side | A straight line that forms part of a shape |
| Corner (Vertex) | The point where two sides meet |
| Circle | A round shape with no sides or corners |
| Triangle | A shape with 3 sides and 3 corners |
| Square | A shape with 4 equal sides and 4 corners |
| Rectangle | A shape with 4 sides (opposite sides equal) and 4 corners |
A shape has 3 sides and 3 corners. What shape is it?
It is a triangle.
How many sides does a rectangle have? A rectangle has 4 sides.
How is it different from a square? In a rectangle, only the opposite sides are equal. In a square, all 4 sides are equal.
Neha sees a round clock on the wall. What shape is the clock face?
The clock face is a circle.
A. Fill in the Blanks
B. Multiple Choice Questions
C. Match the Shape to the Object
D. Short Answer
Shape Hunt: Walk around your house and find objects that match each shape. Write the name of the object next to the shape.
1. Circle: _________________________________________
2. Triangle: _______________________________________
3. Square: ________________________________________
4. Rectangle: ______________________________________
Now draw a picture using only circles, triangles, squares, and rectangles (for example, a house, a train, or a robot).