GRADE 4/5 Lesson Study #2 N. Bekanovic, M. Ferraci, S. Jordan, N. Moore, A. Prosdocimo Introduction to the Protractor

What can you tell me about this square? 4 cm Some attributes we noticed:

Let’s measure an angle To measure angles, we use a protractor.

Now it’s YOUR turn to practise Practise measuring all of the angles on the page using your protractor. Remember 1. Line up the corners. 2. Match the zero line. 3. Start at 0.

How did you do with the protractor? ProblemsSolutions

Let’s draw a right angle together 6 cm line Now it’s a right-angle triangle.

Let’s draw another right angle 6 cm line It’s another right-angle triangle.

Let’s draw a shape with MORE than ONE right angle 6 cm line Now we’ve made a perfect rectangle. How many right angles does this shape have? Ligne de 6 cm

Now it’s YOUR turn again! Try drawing some shapes using a six-centimetre line and a protractor. 6 cm

Here is your FULL mission Grade 4 MissionGrade 5 Mission Now that you know how to draw right angles … In your math notebook: Draw three different quadrilaterals with each having at least one right angle. Now that you know how to draw right angles and you know about different types of triangles … In your math notebook: Draw two scalene triangles with each having one right-angle. and … Draw two isosceles triangles with each having one right angle.