# how to make maths TLM working model (parts of circles) – diy

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:

1. Cardboard: For the base and the circle.
2. Color Paper: For decorating and labeling.
3. LED Lights: At least six LEDs of different colors to highlight different parts of the circle.
4. 9V Battery: Power source for the LED lights.
5. Resistors: To prevent the LEDs from burning out (usually 220Ω for each LED).
6. Switch: To control the LED lights.
7. Wires: For connecting the LEDs to the battery and switch.
8. Glue or Tape: For assembly.
9. Scissors and Craft Knife: For cutting the cardboard and paper.
10. Markers, Paint, or Colored Pencils: For decorating and labeling.
11. 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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