## Angles

#### Introduction to Visual Representation of Angles-1/3

• Lesson Aims
• The first lesson for the learning of the concept of angle using the mouse shaped made in the lesson as an aide.

• Name of Model
• A mouse.

• Lesson Structure
• The mouse,circle and angle as a measure of rotation.

• Lesson Content
• This lesson is the first of three lessons teaching the concept of angle. Through the folding process the pupils have a dynamic experience of this concept. The idea of measure of rotation as a method of understanding the concept of angle is applied with moving the mouse shape clockwise. This method and definition of an angle as a measure of rotation is understood while creating the angle by the rotational movement. Two mice are folded-one to take home and the other for the next lesson on the subject of angle.

Themes: Measurements > Angles

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#### Angles-3/3

• 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.

Themes: Measurements > Angles

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#### Perpendicular Line

• Lesson Aims
• Pupils will recognise perpendicular lines and draw perpendicular lines.

• Name of Model
• The swimming fish.

• The Lesson Structure
• The measuring tool,Composition and Decomposition of Shapes, Polygons 3,Perpendicular  lines and sides of polygons.

• Lesson Content
• In this lesson the pupils will investigate perpendicular and intersecting lines. At the conclusion of this lesson the final model will be a surprise while learning new concepts and revising previously learnt geometrical concepts.

• Prior knowledge
• Angles,right angle,sides of a polygon.

Themes: Measurements > Angles

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#### 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.

Themes: Measurements > Angles

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