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# Recognize and Compose 2-D Shapes

Jul 24, 2023

### Shapes:

We come across different shapes around us in our day-to-day life. So, let us observe the below figure and recall the shapes:

Name the different shapes in the picture given below.

1. Circle
2. Square
3. Rectangle
4. Triangle

Identify the different shapes and count them.

• Number of circles: 4
• Number of triangles: 5
• Number of squares: 3
• Total number of shapes: 12

## 2-D Shapes:

1. Triangle
3. Pentagon
4. Hexagon

### Triangle & Its Attributes:

A triangle has 3 sides and 3 vertices.

Some more different types of triangles are given below:

### Not Triangles:

These are the shapes that are not triangles.

A quadrilateral has 4 sides and 4 vertices.

Some more different types of quadrilaterals are given below:

These are the shapes that are not quadrilaterals.

### Pentagon, Hexagon & Their Attributes:

Pentagon & Its Attributes:

• It has 5 sides.
• It has 5 vertices.

### Hexagon & Its Attributes:

• It has 6 sides.
• It has 6 vertices.

Not pentagons and not hexagons:

Below are the shapes which are not pentagons and hexagons.

Not pentagons and not hexagons:

Below are the shapes that are not pentagons and hexagons.

#### Exercise:

1. Name all the shapes used in the picture.

2. Observe the picture and find the number of circles, triangles, quadrilaterals, and pentagons.

3. Find the total number of triangles in the picture.

4. Name each shape. Find the number of sides and vertices.

5. Identify the shape that is not a hexagon.

6. Connect all the dots to make shapes that have vertices. Name the shapes that you make.

7. Sarah connects all the dots to make a shape. Name the shape that she makes.

8. Find the number of triangles from the tangram below.

9. Juan drew a triangle and a hexagon. How many vertices did he draw in all?

10. Find the number of triangles from the tangram below.

#### What We Have Learned

• Recognizing different shapes.
• Sorting shapes into categories of the triangle, quadrilateral, pentagon, and hexagon based on their attributes.

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