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Constructive Triangles

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  1. Box One - Rectangle Box - Contents
  2. Box One - Rectangle Box - First Presentation
  3. Box One - Rectangle Box - Second Presentation
  4. Box One - Rectangle Box - Third Presentation
  5. Box 2 - Triangle Box - Materials
  6. Box 2 - First Presentation
  7. Box 2 - Second Presentation
  8. Box 2 - Third Presentation
  9. Box 2 - Fourth Presentation
  10. Box Three - Large Hexagonal Box Materials
  11. Box Three - First Presentation
  12. Box Three - Second Presentation
  13. Box Three - Third Presentation
  14. Box Four - Small Hexagonal Box - Materials
  15. Box Four - First Presentation
  16. Box Four - Second Presentation
  17. Box Five - Blue Triangle Box - Contents
  18. Box Five - First Presentation
  19. Box Five - Second Presentation

Participants 38

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Constructive Triangles Box One – Rectangle Box – Third Presentation
Lesson 4 of 19
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Box One – Rectangle Box – Third Presentation

Collin December 31, 2021
  1. Start with the large green square and teach the names of the parts that make up the total figure.
  2. “This is a _______ square.”  Separate the triangles that make up the square and say: “This square is made up of two very special triangles called right angled isosceles triangles.  Can you say _______?”
  3. Show the child that the large yellow parallelogram is also made up of two right-angled isosceles triangles.
  4. Present the two small parallelograms and the grey rectangle.  They are all made up of two right-angled scalene triangles.
  5. Do a three period lesson with the right angled isosceles triangle and the right angled scalene triangle.  Be sure the child knows that an isosceles is a triangle of two equal sides and the scalene is a triangle with each side of different length.
  6. Continue to present in a three period lesson the remaining triangles until the child has learned all the names.
  7. Replace the triangles into the box in the following order:
    1. Large green square to the left bottom of the box.
    1. Small green parallelogram to the right of the square.
    1. Large yellow parallelogram to the left, on the second level.
    1. Small yellow oblique parallelogram to the right of the large yeallow parallelogram.
    1. Place the gray rectangle to the right of the box, third level.
    1. Place the red trapezoid on the top of the grey rectangle.
    1. Place the yellow rhombus to the left of the grey rectangle.

POINTS OF INTEREST

  • Touching the black line.
  • Matching the triangles.
  • Indirect superimposing when triangles fit in the box.
  • Naming the shapes and the various triangles used to make them.

CONTROL OF ERROR

  • Black guidelines of triangles.
  • Color of triangles.

DIRECT AIMS

  • Show the various four sided forms constructed from two shapes.
  • Development of ability to discriminate geometric forms.
  • Growth in concentration and independence.

INDIRECT AIMS

  • Preparation for Geometry.
  • Development of appreciation of line and form.
  • Development of creativity.

LANGUAGE

  • Names of quadrilaterals and names of triangles.

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