Creating a working model to demonstrate the area of a circle using cardboard and colored paper can be a fun and educational activity.

Here’s a step-by-step guide to building a simple but effective model:

### Materials Needed:

- Cardboard (for the base)
- Colored paper (for the circle)
- Compass or a circular object for drawing the circle
- Ruler
- Pencil
- Scissors
- Glue
- Marker
- String (optional)

### Area of Circle Working Model Construction:

**Create the Base:**- Cut a square or rectangular piece of cardboard to serve as the base of your model.

**Draw and Cut Out the Circle:**- Using a compass or a circular object as a guide, draw a circle on colored paper. This will represent the circle whose area you want to calculate.
- Cut out the circle neatly.

**Label the Circle:**- Write the necessary information on the colored paper, such as the radius (r) and any relevant formulas or explanations.

**Attach the Circle to the Base:**- Glue the colored paper circle onto the cardboard base.

**Radius Measurement:**- Using a ruler, measure the radius of the circle on the colored paper, and mark it with a pencil. Alternatively, you can use a string to measure the radius and then measure the string with a ruler.

**Calculate the Area:**- Write down the formula for calculating the area of a circle: �=��2
*A*=*π**r*2. - Substitute the measured radius into the formula to find the area.

- Write down the formula for calculating the area of a circle: �=��2