Triangles activity A
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Triangles activity A
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Each pupil should select one sheet.
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A discussion question:
What is the name of the polygon shape of the sheet that you have?How did you check this? -
In this activity, we will classify the polygons according to the number of sides.
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Answer:
The sheet has the shape of a quadrilateral. A polygon with 4 sides and 4 vertices is named a quadrilateral.
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Folding instructions: Fold the opposite vertices of your sheet and then open the sheet.
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Folding instructions:
Cut your sheet on the line of symmetry to obtain two triangles. -
The sheets can be cut at the beginning of the activity.
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Decomposition and composition: Can you join these two triangular shapes in order to obtain a larger triangle?
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A discussion question:
How did you check your new larger triangle shape? -
The pupils count the number of edges and vertices.
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Folding instructions: With one of your triangle shapes, fold two vertices as seen in the animation.
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At the conclusion of this activity, pupils will glue their shapes onto a page of their exercise books. They should glue their shapes in an inclined way.
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Folding instructions:
Fold your shape as seen in the animation.
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Folding instructions:
Fold two sides as shown towards the line of symmetry, so that a kite shape will be seen. -
At this stage of folding, ensure that the pupils are folding the correct sides as in the animation.
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Folding instructions: Turn over your shape.
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Folding instructions: Join the sides, as shown in the animation.
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A discussion question:
Can you count all the triangle shapes resulting from your folding?
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Folding instructions:
Fold as seen in the animation. -
At this stage, the pupils should check all the triangles as seen from the folding.
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Folding instructions:
Turn over your shape.
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Folding instructions:
Fold the triangle shape as seen in the animation.
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Folding instructions:
Fold the two vertices, as shown.
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Activity:
Can you draw the cheese for the mouse?
- Lesson Aims
The pupils will be able to identify and investigate triangles according to sides and vertices.
- Name of Model
A mouse.
- The Lesson structure
Triangles activity A, Triangles activity B , Polygon activity A, Polygon activity A, Polygon activities B 1/2 , Polygon activities B 2/2 , Polygon activity C , A measuring tool for comparison of lengths , Quadrilaterals A , Quadrilaterals B: Square & Rectangle – same and different, Line of reflective symmetry 1/2, Line of reflective symmetry 2/2, Quadrilaterals C: Square & Rectangle , Lines of symmetry in quadrilaterals, Translation of shapes
- Lesson content
In this lesson, the pupils will investigate the triangular shapes as formed in the folding process. The classification is made according to the number of sides. At the conclusion of the folding process, the final model comes as a surprise. The pupils learn new concepts and review previously learnt concepts.
- Prior Knowledge
- Stages in the curriculum
- Materials
- Origami sheets 15 cm x 15 cm-2 per pupil
