Classification of triangles using sides and angles

Classification of triangles using sides and angles
  • Lesson Aims
    • Classifying triangles according to the angles of the triangles.
    • Identifying right angled triangles, acute triangles and obtuse triangles.
    • Classifying triangles according to the sides of the triangles.
    • Drawing and naming triangles according to both properties of sides and angles.

     

     

  • Name of Model
  • The angled bird.

  • Lesson Structure
  • Measuring tool,composition and decomposition of polygons, polygons 3, parallel lines and sides,circle,mouse,visual representation of angles-measure of rotation,angled bird.

  • Lesson content
  • In this lesson pupilsinvestigate different triangles formed as a result of folding the model. A surprise final model using old and new terms for descriptions.

  • Prior Knowledge
  • The concept of a right angle and visual representation of an angle.

  • Materials
  • The measuring tool and 15cm x 15 cm origami sheets.

Feedback from colleagues

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