Perimeter

Last Updated on July 15, 2020 by Alabi M. S.

 MATHEMATICS 

SECOND TERM

WEEK 4/PRIMARY 6

WEEK 6/PRIMARY 5

TOPIC: Perimeter 

LEARNING AREA 

  1. Lesson One – Introduction to perimeter
  2. Lesson Two – Perimeter of rectangle
  3. Lesson Three –  Perimeter of compound shapes
  4. Lesson Four – Quantitative Reasoning

TIME – 40 Minutes each.

LEARNING OUTCOME 

By the end of the lesson, the pupils should be able to:

  1. Reviewing work done on perimeters of plane shapes.
  2. Identifying rectangles that have same area but different perimeters.
  3. Finding the perimeters of compound shapes.

RATIONALE

Perimeter is a distance round a shape. Perimeter means the sum of lengths of all the sides of a plane shape – triangles, other quadrilaterals and higher polygons = sum of lengths of all sides. It can be used to calculate the length of fence surrounding a building or garden. Two shapes may have the same perimeter, but different areas or may have the same area, but different perimeters.

The concept of perimeter will enable pupils to understand the different between areas and perimeter and appreciate the use of perimeter within and around us.

LEARNING MATERIALS 

  1. Ruler and measuring tape
  2. Box – square and rectangular faces
  3. Chart of triangle, square and rectangle
  4. Improvises measuring materials like hands, legs, or any length wood or rod.

PREVIOUS KNOWLEDGE

  1. Measuring length
  2. Triangle
  3. Square
  4. Rectangle
  5. Area of triangle, square and rectangle.

REFERENCE MATERIALS

  1. 9 – Years Basic Education Curriculum
  2. Lagos State Scheme of work
  3. New Method Mathematics Book 6
  4. All Relevant Materials
  5. Online Materials

LESSON PLAN/DEVELOPMENT 

ASEI PDSI PLAN ON PERIMETER 

LESSON DEVELOPMENT 1 – INTRODUCTION OF PERIMETER document

Step 1 – Introduction (5 minutes)

TEACHER’S ACTIVITIES 

  • Guides pupils to identify different types of plane shapes on chart.

PUPIL’S ACTIVITIES 

  • Pupils identify triangle (types), square, rectangle, etc..

LEARNING POINT – Previous knowledge and lesson

Step 2 – Development (5 minutes)   

  1. Groups the pupils into four groups – A, B, C, and D.
  2. Guide the pupils to choose a leader and secretary for your group.
  3. Gives each group learning materials – measuring tape.

PUPIL’S ACTIVITIES 

  1. Belong to a group.
  2. Choose their leader and secretary.
  3. Received learning materials for their group.

LEARNING POINT – Pupil’s group, leader and secretary confirmed.

Step 3 -Development – (10 minutes) 

TEACHER’S ACTIVITIES 

  1. Takes pupils out to the field and guides them to measure the lengths of the field.
  2. Names each length according to their group – length A, B C and D.

PUPIL’S ACTIVITIES 

  1. Measure the lengths of the School’s field.
  2. Length A –
  3. Length B –
  4. Length C –
  5. Length D –

LEARNING POINT – Length

Step 4 -Development – (10 minutes)  

Guides the pupils to add –

  1. Length (A + B), named it AB
  2. Length (C + D), named it CD
  3. Length (AB + CD), named it perimeter.

Pupil’s Activities

Working

  1. Length AB = ____ cm
  2. Length CD = ____ cm
  3. Perimeter = ____ cm

LEARNING POINT – Introduction to perimeter

Step 5 – CONCLUSION (10 minutes)  

CONCLUSION

To conclude the lesson for the week, the teacher revises (through questions and answers) the entire lesson and links it to the next lesson. When you add together all the lengths of a shape, you are calculating its perimeter.

PUPIL’S ACTIVITIES

  1. Listen, ask and answer questions.
  2. Perimeter means the sum of lengths all the sides of a plane shape.

LEARNING POINT – Conclusion

LESSON DEVELOPMENT 2 – PERIMETER OF RECTANGLE document

Step 1- Introduction (5 minutes)

TEACHER’S ACTIVITIES 

  1. What is perimeter?
  2. Describe the shape – rectangle.
  3. What is the shape of a field?

PUPIL’S ACTIVITIES 

  1. Perimeter means the sum of lengths all the sides of a plane shape.
  2. Rectangle is a 4 sided shape. 2 opposite sides are equal.
  3. It is a rectangle.

LEARNING POINT – Previous knowledge and lesson

Step 2 – Development (5 minutes)

TEACHER’S ACTIVITIES 

  1. Groups the pupils into four groups – A, B, C, and D.
  2. Guide the pupils to choose a leader and secretary for your group.
  3. Gives each group learning materials.

PUPIL’S ACTIVITIES 

  1. Belong to a group.
  2. Choose their leader and secretary.
  3. Received learning materials for their group.

LEARNING POINT – Pupil’s group, leader and secretary confirmed.

Step 3 – DEVELOPMENT (10 minutes)

TEACHER’S ACTIVITIES 

  • Guides pupils to arrive at the formula – P = 2(l + b).
  1. Rectangle has how many sides?
  2. What is the name of each side?
  • Leads pupils to:
  1. Add the 2 length and 2 breaths together.
  2. The result is the formula for perimeter. That’s P = 2(L + B).

PUPIL’S ACTIVITIES 

  1. Rectangle has 4 sides.
  2. Rectangle has 2 Lengths and 2 breaths.
  3. 2 lengths + 2 breaths = 2L + 2B
  4. Perimeter (P) = 2(L + B)

LEARNING POINT – Formula of a perimeter

Step 4 – Development (10 minutes)

TEACHER’S ACTIVITIES

Guides the pupils to find the perimeter of:

        

 

 

 

 

 

PUPIL’S ACTIVITIES 

Working

1. Length = 14 cm and breath = 4cm

P = 2(L + B) = 2(14 + 4) cm

= 2(18) cm = 2 x 18 cm

= 36 cm

2. Length = 12 cm and breath = 32 cm

P = 2(L + B) = 2(12 + 32) cm

= 2(36) cm = 2 x 36 cm = 72 cm.

LEARNING ACTIVITIES – Perimeter of rectangle

Step 5 – ASSIGNMENT/CONCLUSION (10 minutes)  

ASSIGNMENT

Find the perimeter of the following rectangles whose dimensions are given below:

  1. Length 18 cm and breath 11 cm.
  2. Length 7 cm and breath 19 cm

CONCLUSION  

To conclude the lesson for the week, the teacher revises (through questions and answers) the entire lesson and links it to the next lesson.

PUPIL’S ACTIVITIES 

  1. Assignment taken.
  2. Listen, ask and answer questions.

LEARNING POINT – Assignment and Conclusion

LESSON DEVELOPMENT 3 – PERIMETER OF COMPOUND SHAPES document

Step 1 – Introduction (5 minutes)

TEACHER’S ACTIVITIES 

Find the perimeter of the following rectangles whose dimensions are given below:

  1. Length 18 cm and breath 11 cm.
  2. Length 7 cm and breath 19 cm.

PUPIL’S ACTIVITIES 

1. P = 2(L + B) = 2 (18 + 11) cm

P = 2(39) cm

P = 2 x 29 cm

P = 58 cm.

2. P = 2(7 + 19) cm

P = 2 (26) cm

P = 2 x 26 cm

P = 52 cm

LEARNING POINT – Previous knowledge and lesson

Step 2 – Development (5 minutes)

TEACHER’S ACTIVITIES 

  1. Groups the pupils into four groups – A, B, C, and D.
  2. Guide the pupils to choose a leader and secretary for your group.
  3. Gives each group learning materials. Box.

PUPIL’S ACTIVITIES 

  1. Belong to a group.
  2. Choose their leader and secretary.
  3. Received learning materials for their group.

LEARNING POINT – Pupil’s group, leader and secretary confirmed.

Step 3 – Development (10 minutes)

TEACHER’S ACTIVITIES 

  1. Guides the pupils to identify diagram on the chart and the sample of the diagram.
  2. Leads pupils to cut out the net of the box.
  3. Guides the pupils to count the faces of the net.
  4. Leads pupils to measure each line and add altogether.

PUPIL’S ACTIVITIES 

  1. Box
  2. 6 faces
  3. 14 lines
  4. P = (10 + 5 + 5 + 6 + 5 + 5 + 6 + 10 + 6 + 5 + 5 + 6 + 5 + 5) cm = 84 cm

LEARNING POINT – Compound shape

Step 4 – Development (10 minutes)

TEACHER’S ACTIVITIES

Guides the pupils to find the perimeter of

PUPIL’S ACTIVITIES

Working

Perimeter = (10 + 3 + 2 + 2 + 1.5 + 2 + 2 + 2.5 + 1.5 + 2.5 + 3 + 3) cm = 35 cm

LEARNING POINT – Compound shape

Step 5 – Assignment/Conclusion (10 minutes)  

ASSIGNMENT

find the perimeter of

CONCLUSION

To conclude the lesson for the week, the teacher revises (through questions and answers) the entire lesson and links it to the next lesson.

PUPIL’S ACTIVITIES 

  1. Assignment taken.
  2. Listen, ask and answer questions.

LEARNING POINT – Assignment and Conclusion