How to make Types of Angles Working Model Using LED Lights

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Concept:

This working model demonstrates different types of angles (acute, obtuse, right, straight, etc.) and their properties. Using LED lights, a 9V battery, a buzzer, and conductive materials like nails or wires, the project enables students to match the name of an angle type with its visual representation or degree measure.

Materials Required:

LED lights (different colors for each angle type)

  1. 9V battery and battery clip
  2. Buzzer
  3. Nails or conductive pins
  4. Wires (for connections)
  5. Cardboard or wooden board (as the base)
  6. Printed or drawn angle diagrams (acute, obtuse, right, etc.)
  7. Labels for angle types (e.g., “Acute Angle,” “Obtuse Angle”)
  8. Copper tape or insulated wires for circuits
  9. Resistors (to protect LEDs)

Steps to Build:

  1. Prepare the Board:
    • Divide the board into two sections:
      • Ride Side: Labels for types of angles (e.g., “Acute Angle”).
      • Left Side: Drawings or visual representations of angles, each with a specific degree measurement.
  2. Install Nails or Pins:
    • Place nails or conductive pins below each label and angle representation.
    • Connect the correct pairs of nails (left side to right side) using hidden wires under the board.
  3. Set up the Circuit:
    • Use wires to connect nails for each pair (label and angle) in a circuit containing:
      • An LED and a buzzer.
      • A resistor to limit current for the LED.
    • Connect the circuits to a 9V battery. Use diodes or unique paths to ensure only correct matches complete a circuit.
  4. Matching Mechanism:
    • Each pair of nails corresponds to a specific type of angle.
    • When the correct connection is made (e.g., using a wire or clip), the circuit closes, and:
      • The LED lights up, showing a correct match.
      • The buzzer sounds, providing auditory feedback.
  5. Test the Model:
    • Verify that the LED and buzzer activate only for correct matches.
    • Ensure incorrect connections do not complete any circuit.

Usage:

Objective: Match the name of the angle type (e.g., “Right Angle”) with its correct visual representation (e.g., 90° angle diagram).

  1. Process: Connect a wire or clip from a label on the left to an angle diagram on the right.
  2. Feedback:
    • Correct match: LED lights up and buzzer sounds.
    • Incorrect match: No response.

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