Title: Lesson: Perimeter
Course: 2024 Math 5° (reference)

What is Perimeter?

Watch the video and when you finish answer the exercises on the next pages.

Make sure you have a paper and pencil.

True or false

The perimeter of a geometric shape is the total length of all its sides.

- True
Feedback: Very good!
- False
Feedback: Incorrect!!! Try again!

Perimeter of a square

A square has 4 sides, each side is 10 cm long.

What is the Perimeter?

- 40cm
Feedback: Very Good!!
- 20 cm
Feedback: Try again! Remember: to calculate the perimeter of a shape, you need to add up the lengths of its sides.
- 10 cm
Feedback: Try Again! Remember: to calculate the perimeter of a shape, you need to add up the lengths of its sides.

Perimeter of a Rectangle

Calculate the perimeter of this rectangle:

- 26 cm
Feedback: Very Good!!
- 13 cm
Feedback: Try Again!! Remember: to calculate the perimeter of a shape, you need to add up the lengths of its sides.
- 36 cm
Feedback: Try Again!! Remember: to calculate the perimeter of a shape, you need to add up the lengths of its sides.

Perimeter of a triangle

Calculate the perimeter of this triangle:

- 26 m
Feedback: Very Good!
- 26
Feedback: Try Again!!! You are missing something... UNITS
- 540cm
Feedback: Try Again!! Remember: To calculate the perimeter of a shape, you need to add up the lengths of its sides

Perimeter irregular polygon

Calculate the perimeter of the irregular polygon.

Hint:  Find the missing values.  Remember to add ALL the sides.

- 24 m
Feedback: Very Good!!
- 16 m
Feedback: Try Again. Remember: To calculate the perimeter of a shape, you need to add up the lengths of its sides. You need to find out the length of the missing sides.
- 20 m
Feedback: Try Again! Remember: To calculate the perimeter of a shape, you need to add up the lengths of its sides. You need to find out the length of ALL the missing sides.

Summary

This is the end of this lesson.

Event: Lesson: Perimeter opens