Yr7 Unit 7 Week 1 Lesson 2

Yr7 Unit 7 Week 1 Lesson 2
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Slide 1: Diapositive
MathematicsLower Secondary (Key Stage 3)

Cette leçon contient 33 diapositives, avec quiz interactifs et diapositives de texte.

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Yr7 Unit 7 Week 1 Lesson 2

Slide 1 - Diapositive

Starter 
Simplify the following ratios 

          
timer
4:00
10 : 50
2 : 22
6 : 15
20 : 100
14 : 35 
24 : 64 
15 : 60
55 : 100

Slide 2 - Diapositive

Starter 
Simplify the following ratios 

          
10 : 50
2 : 22
6 : 15
20 : 100
1 : 5
1 : 11
2 : 5
1 : 5
14 : 35 
24 : 64 
15 : 60
55 : 100

Slide 3 - Diapositive

Starter 
Simplify the following ratios 

          
10 : 50
2 : 22
6 : 15
20 : 100
1 : 5
1 : 11
2 : 5
1 : 5
14 : 35 
2 : 7
24 : 64 
15 : 60
1 : 4
55 : 100
11 : 20
3 : 8 

Slide 4 - Diapositive

Describe what is a protractor

Slide 5 - Carte mentale

Measuring Angles With A Protractor
A protractor is a simple device which is traditionally in a shape of a semi circular disc and can measure any angle between 0 and 180 degrees.

Slide 6 - Diapositive

Measuring Angles With A Protractor
In order to make it easier to use, it contains two scales. One reads angles with respect to a clockwise direction. The other scale reads with respect to an anticlockwise direction.

Slide 7 - Diapositive

Starter 
Simplify the following ratios 

          
2 : 14
4 : 20
9 : 15
40 : 100
18 : 45 
30 : 90 
36 : 12
100 : 25
timer
4:00

Slide 8 - Diapositive

Starter 
Simplify the following ratios 

          
2 : 14
4 : 20
9 : 15
40 : 100
1 : 7
1 : 5
3 : 5
2 : 5
18 : 45 
30 : 90 
36 : 12
100 : 25

Slide 9 - Diapositive

Starter 
Simplify the following ratios 

          
2 : 14
4 : 20
9 : 15
40 : 100
1 : 7
1 : 5
3 : 5
2 : 5
18 : 45 
2 : 5
30 : 90 
36 : 12
3 : 1
100 : 25
4 : 1
1 : 3

Slide 10 - Diapositive

How To Measure An Angle Using A Protractor
The following key points to measuring this angle are:

Slide 11 - Diapositive

How To Measure An Angle Using A Protractor
The following key points to measuring this angle are:
•  Place the centre of protractor at the point  
   where the two lines join together

Slide 12 - Diapositive

How To Measure An Angle Using A Protractor
The following key points to measuring this angle are:
•  Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

Slide 13 - Diapositive

How To Measure An Angle Using A Protractor
The following key points to measuring this angle are:
•  Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

•  Use the inner scale and read where the   
   second line meets the scale

Slide 14 - Diapositive

Example 1

•  Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

•  Use the outer scale and read where the   
   second line meets the scale

Slide 15 - Diapositive

Example 1
 . Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

•  Use the outer scale and read where the   
   second line meets the scale

                120 degrees anticlockwise

Slide 16 - Diapositive

Example 2
.  Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

•  Use the inner scale and read where the   
   second line meets the scale

Slide 17 - Diapositive

Example 2
.  Place the centre of protractor at the point  
   where the two lines join together

•  Place the zero line on one of the lines  
   making the angle

•  Use the inner scale and read where the   
   second line meets the scale

                    80 degrees clockwise

Slide 18 - Diapositive

Do You Understand how to use a protractor to measure an angle?
I understand the method used to measure an angle including using the correct scale.
I know how to set up the protractor but do not know which scale to use.
I am not sure what is clockwise and what is anticlockwise
I am not sure how to read the different scales
I do not know how to get started.

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