Transcript INTRODUCTION TO THE PROTRACTOR

Introduction to the Protractor
GRADE 4/5
Lesson Study #2
N. Bekanovic, M. Ferraci, S. Jordan, N. Moore, A. Prosdocimo
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?
Problems
Solutions
Let’s draw a right angle together
Now it’s a right-angle triangle.
6 cm line
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
Now we’ve made a
perfect rectangle.
6 cm line
How many right angles does this shape have?
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 Mission
Now that you know how to draw
right angles …
Grade 5 Mission
Now that you know how to draw
right angles and you know about
different types of triangles …
In your math notebook:
In your math notebook:
Draw three different quadrilaterals
with each having at least one right
angle.
Draw two scalene triangles with
each having one right-angle.
and …
Draw two isosceles triangles with
each having one right angle.