**2D Polygon Shapes Introduction:**

In geometry, a polygon is a two-dimensional (2D) closed figure formed by straight line segments. The sides of a polygon do not cross each other, and each side intersects exactly two others.

The common types of 2D polygons include:

**Triangle:**A polygon with three sides.**Quadrilateral:**A polygon with four sides. Examples include squares, rectangles, parallelograms, and rhombuses.**Pentagon:**A polygon with five sides.**Hexagon:**A polygon with six sides.**Heptagon:**A polygon with seven sides.**Octagon:**A polygon with eight sides.**Nonagon:**A polygon with nine sides.**Decagon:**A polygon with ten sides.

### Working model for a math project involving 2D and 3D polygon shapes making

Creating a working model for a math project involving 2D and 3D polygon shapes using cardboard can be both educational and fun.

Below is a step-by-step guide to help you build a model that showcases various types of polygon shapes:

**Materials Needed:**

- Cardboard sheets
- Ruler
- Pencil
- Craft knife or scissors
- Colored markers or paper
- Glue
- Toothpicks or straws
- Small paper or cardboard rectangles for labels

**Video Step by Steps on polygon shapes working model:**

**Prepare the Base:**- Cut a large piece of cardboard to serve as the base of your model.

**Create 2D Polygon Shapes:**- Draw and cut out various 2D polygon shapes such as triangles, quadrilaterals, pentagons, hexagons, etc., from colored paper or cardboard.
- Label each shape with its name and the number of sides.

**Arrange 2D Shapes:**- Arrange the 2D polygon shapes on the cardboard base, creating an aesthetically pleasing arrangement.
- Attach each shape to the base using glue.

**Create 3D Polygon Shapes:**- To represent 3D shapes, cut out corresponding 2D shapes to act as the faces of the 3D shapes. For example, a cube would have six squares.
- Fold the faces along the edges and attach them together using glue or tape to form 3D shapes.
- Create a variety of 3D shapes such as cubes, pyramids, prisms, cylinders, and spheres.

**Arrange 3D Shapes:**- Place the 3D shapes on the cardboard base alongside the 2D shapes.
- Use toothpicks or straws to connect the 2D shapes to their corresponding 3D shapes, representing the transformation from 2D to 3D.

**Label and Annotate:**- Label each 2D and 3D shape with its name, the number of sides or faces, and any other relevant information.
- You can create small cardboard rectangles as labels and attach them next to each shape.

**Color and Decorate:**- Use markers or colored paper to add vibrant colors to your shapes, making the model visually appealing.