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Course: MAP Recommended Practice > Unit 24
Lesson 7: Perimeter- Perimeter: introduction
- Perimeter of a shape
- Find perimeter by counting unit squares
- Find perimeter by counting units
- Finding perimeter when a side length is missing
- Find perimeter when given side lengths
- Finding missing side length when given perimeter
- Perimeter review
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Perimeter review
Review the basics of perimeter and try some practice problems.
What is perimeter?
Perimeter is the distance around the outside of a two-dimensional shape.
The perimeter of the shapes below is shown in .
Want to learn more about the concept of perimeter? Check out this video.
How do we calculate the perimeter of a shape?
To find the perimeter of a shape, we add all of the shape's side lengths.
Example 1:
What is the perimeter of the trapezoid?
We can find the perimeter by adding all of the side lengths.
Example 2:
What is the perimeter of the regular pentagon?
We can find the perimeter by adding all of the side lengths.
All sides of a regular pentagon are the same length.
Want to learn more about calculating perimeter? Check out this video.
Practice set 1: Calculate perimeter
Want to try more problems like this? Check out these exercises:
Find perimeter when given side lengths
Find perimeter by counting unit squares
Find perimeter when given side lengths
Find perimeter by counting unit squares
Practice set 2: Challenge items
Want to try more problems like this? Check out these exercises:
Find a missing side length when given perimeter
Perimeter word problems
Find a missing side length when given perimeter
Perimeter word problems
Want to join the conversation?
- If two or more sides of a shape is unknown, what can you do to figure that out?(63 votes)
- If you want to figure it you have to see the othr stuff first then you would figure it out but if not i don't know it worked for me(11 votes)
- How will I use this in real life?(31 votes)
- So you will use it if you are going to build a house it will also help with fences!(1 vote)
- its a bit challenging though. you really need analyzing skills for it ahaha.(11 votes)
- what is 100x10,000000?(7 votes)
- A certain number.(13 votes)
- If two or more sides of a shape is unknown, what can you do to figure that out?(6 votes)
- Well, it depends on the shape, really...(5 votes)
- I love this so fun it is so fantastic(11 votes)
- Why do you put this here why why!(1 vote)
- how can you see perimeter in 3D polygons(13 votes)
- Yeah, I agree, Mr. Taylor—I got confused, the angle change puzzled me, but I realized my mistake and corrected it.(10 votes)