Angles-3/3
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Angles-3/3
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For this lesson use the circle and mouse from the previous lessons.
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Folding instructions: Glue the the triangle of the mouse as shown.
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Use a stick for glueing the triangle.
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Folding instructions: Put the mouse on one of the segments of the circle.
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The pupils must put the mouse on one of the fold lines on the circle.
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Instruction: Put a 0 on the line where the mouse is glued.
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Instruction: Place the mouse firmly in order to rotate it and find the cheese.
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Check that the mouse is placed firmly.
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A discussion question: The mouse has to make a complete rotation in order to find the cheese. What is the size of this rotation?
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Allow the pupils to suggest answers before showing the next animation.
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Answer: The measure size of a complete rotation is 360 degrees.(360°)
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The unit of degree measurement is shown as a small circle on above the right side of the number 360°.
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A discussion question: What is the size of the rotation made by the mouse? Explain.
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Answer: The mouse rotated half a circle and the size of the rotation is 180°.
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A discussion question: What is the size of the rotation made by the mouse? Explain.
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Answer: The mouse rotated a quarter of a circle and the size of the rotation is 90°.
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A discussion question: What is the size of the rotation made by the mouse? Explain.
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Answer: The mouse rotated three quarters of a circle and the size of the rotation is 270°.
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A pair activity: In turn rotate the mouse and ask what is the size of the rotation in degree measurement.
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A final question: What is the size of each rotation?
- Lesson Aims
Pupils will recognize that the size of an angle is determined by the measure of rotation in relation to a given segment line.
- Name of Model
The mouse game looking for the cheese.
- Lesson Structure
Mouse, circle and the visualization of the mouse rotation on the circle.
- Lesson Content
This lesson is the 3rd activity demonstrating the concept of angle as measure of rotation.
- Materials
Glue stick,mouse and circle.
