Length + Perimeter

Length and perimeter 
Schedule: 
  • Learning goals
  • New unit
  • Vocabulary 
  • Starter 
  • Work + explanation 
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Length and perimeter 
Schedule: 
  • Learning goals
  • New unit
  • Vocabulary 
  • Starter 
  • Work + explanation 

Slide 1 - Diapositive

Learning goals 
At the end of this lesson I can:
  •  Use the correct vocabulary from measuring with length
  • Convert length units 
  • Calculate the perimeter of a closed figure 

Slide 2 - Diapositive

Measurements: Length and area

Slide 3 - Carte mentale

Length + perimeter 
Length is a measure of _______________________
The ___________ (m) is the base unit for length in the metric system

A ______________ is a (2D) shape with at least 3 straight sides
The perimeter of a polygon is the ________________ around its ________________

Complete: 
Polygon, metre, boundary, distance
(you will need to use 1 word twice)

Slide 4 - Diapositive

Length + perimeter 
Length is a measure of Distance
The Metre (m) is the base unit for length in the metric system

A Polygon is a (2D) shape with at least 3 straight sides
The perimeter of a polygon is the Distance around its Boundary

Complete: 
Polygon, metre, boundary, distance
(you will need to use 1 word twice)

Slide 5 - Diapositive

How long are 3 laps around a football field approximately? 
How long is on edge of a die approximately? 
How thick a paperclip approximately? 
1 cm
1 km
1 mm

Slide 6 - Question de remorquage

Starter 
1. Convert 3020 m in km. 

2. Find the sum of 4.5 m and 63 cm 
3. Find the perimeter of: 
a) 


b) 

Slide 7 - Diapositive

Starter 
1. Convert 3020 m in km. 
3020 m = 3.02 km

2. Find the sum of 4.5 m and 43 cm 
4.5 m = 450 cm
450 cm + 43 cm = 493 cm
3. Find the perimeter of: 
a) 


b) 
15
24

Slide 8 - Diapositive

What to do

- I really want a challenge                                                  Open the Pink slides on LessonUP

- I understand it, but I think a                                           Open the Blue slides on LessonUp
 bit more practice will help me                 

- I think more practice will help me,                             Work with the board
and would like to do more board work                                                               

Slide 9 - Diapositive

Length conversion

Slide 10 - Diapositive

Adding lengths
If you want to add lengths together, they MUST be the same unit

To add 5 m and 25 cm: 
1. convert the lengths to the same unit
5 m = 500 cm          25 cm = 25 cm 
2. Add all the lengths
500 cm + 25 cm = 525 cm 

Slide 11 - Diapositive

Perimeter 
Perimeter is the distance around a 2D-shape


Slide 12 - Diapositive

Extra practice + help
p. 248: 12A                3bcf, 7behk, 8ac
p. 250: 12B                1abcd, 2abc, 4a


Slide 13 - Diapositive

Extra practice 
p. 248: 12A                 7cfil, 9, 12, 13
p. 250: 12B                3abc, 5, 7, 9, 10


Slide 14 - Diapositive

Challenge 
p. 248: 12A                 9, 11, 14, 15
p. 250: 12B                 9, 11, 12
        ManageBac > Files > Unit 5: Measurements > Perimeter challenge 

Slide 15 - Diapositive