In this post we have given the instruction on how to make the maths TLM working model (parts of circles) – diy using cardboard at home

Creating a working model to demonstrate the parts of a circle using a 9V battery and LED lights can be both educational and visually appealing.

This model will help illustrate different parts of a circle such as the radius, diameter, chord, arc, sector, and tangent.

Here’s how to create a “match the following” activity using LED lights to highlight each part of the circle:

### Materials Needed:

**Cardboard**: For the base and the circle.**Color Paper**: For decorating and labeling.**LED Lights**: At least six LEDs of different colors to highlight different parts of the circle.**9V Battery**: Power source for the LED lights.**Resistors**: To prevent the LEDs from burning out (usually 220Ω for each LED).**Switch**: To control the LED lights.**Wires**: For connecting the LEDs to the battery and switch.**Glue or Tape**: For assembly.**Scissors and Craft Knife**: For cutting the cardboard and paper.**Markers, Paint, or Colored Pencils**: For decorating and labeling.**Ruler and Compass**: For drawing the circle and measuring.

### how to make math’s TLM working model on circles match the following

#### 1. Prepare the Base:

- Cut a large rectangular piece from the cardboard. This will serve as the base of your model.
- Optionally, cover the base with color paper or paint it for a more polished look.

#### 2. Create the Circle:

- Using a compass, draw a large circle on another piece of cardboard.
- Cut out the circle and draw its parts (radius, diameter, chord, arc, sector, tangent) on the circle.

#### 3. Define the Parts:

**Radius**: A line from the center to any point on the circle.**Diameter**: A line passing through the center, touching two points on the circle.**Chord**: A line segment within the circle that does not pass through the center.**Arc**: A curved line that is part of the circle’s circumference.**Sector**: A region bounded by two radii and the arc between them.**Tangent**: A line that touches the circle at exactly one point.

#### 4. Attach the Circle to the Base:

- Glue or tape the circle onto the center of the rectangular cardboard base.

#### 5. Attach the LEDs:

- Place LEDs at strategic points on the circle to highlight each part:
**Center**: To mark the center of the circle.**Radius**: Along the line from the center to the edge.**Diameter**: Across the circle.**Chord**: A line segment within the circle.**Arc**: Along the curved edge of the circle.**Sector**: Within the region formed by two radii.**Tangent**: At a point where a line touches the circle externally.

#### 6. Wire the LEDs:

- Connect each LED to a resistor to prevent it from burning out.
- Use wires to connect each LED to the 9V battery through the switch. This can be done in parallel to ensure each LED gets the same voltage.
- Secure the wires neatly on the back of the base using tape or glue.

#### 7. Install the Switch:

- Attach the switch to the base in an accessible location.
- Connect the switch to the battery and complete the circuit with the LEDs.

#### 8. Label the Parts:

- Create labels for each part of the circle on color paper.
- Attach these labels to the corresponding LEDs or near them on the circle.
- Create matching labels and place them on the other side of the base to create a “match the following” activity.

#### 9. Test the Model:

- Turn on the switch to light up the LEDs.
- Ensure each LED lights up correctly and corresponds to the correct part of the circle.

### Tips:

- Double-check all wiring connections to ensure there are no short circuits.
- Use different colored LEDs for each part to make it visually distinct.
- Ensure all labels are clear and correctly placed to facilitate easy matching.

### Conclusion:

This working model is an excellent tool to help students visualize and understand the different parts of a circle. It combines hands-on activity with visual learning, making it a fun and educational project. Enjoy building and learning from your model!

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