Hello everyone! Today, we’re going to learn about something called the perimeter. You might be wondering, “What is the perimeter?” Well, the perimeter is the total distance around the outside of a shape. It’s like walking around the edge of a playground or a garden. We measure the perimeter in units like feet, inches, or meters.
To find the perimeter of a shape, we add up the lengths of all its sides. Let’s look at a simple example. Imagine a triangle with sides that are 12 inches, 14 inches, and 10 inches long. To find the perimeter, we add 12 + 14 + 10, which equals 36 inches. So, the perimeter of this triangle is 36 inches!
Now, let’s think about a square. A square has four sides that are all the same length. If each side is 20 feet long, we can find the perimeter in two ways. We can add 20 + 20 + 20 + 20, which equals 80 feet. Or, we can multiply the number of sides (4) by the length of one side (20 feet). Either way, the perimeter of the square is 80 feet.
Knowing the perimeter is important in real life. For example, if you’re building something like a fence or a garden, you’ll need to know how much material to buy. Let’s see how this works with an example.
Anna wants to put a fence around her vegetable garden. Her garden is shaped like a rectangle and is 6 feet wide and 10 feet long. To find out how much fencing she needs, we calculate the perimeter. We can add 6 + 6 + 10 + 10, which equals 32 feet. Or, we can multiply 2 sides by 6 feet and 2 sides by 10 feet, which also gives us 32 feet. So, Anna needs 32 feet of fencing.
John wants to put white tape around his pool to separate it from the grass. His pool has sides measuring 16 feet, 36 feet, 29 feet, 23 feet, 13 feet, and 13 feet. To find out how much tape he needs, we add all the sides: 16 + 36 + 29 + 23 + 13 + 13, which equals 130 feet. So, John needs 130 feet of tape.
Now that you know how to find the perimeter, why not try it yourself? Grab a measuring tape and find the perimeter of your room or any other object around you. It’s fun and easy!
Did you enjoy learning about perimeter? There are many more exciting things to discover in geometry. Keep exploring and have fun!
Perimeter Hunt: Go on a perimeter hunt around your home or classroom. Find different objects like tables, books, or picture frames. Use a measuring tape or a ruler to measure each side of the object. Add up the lengths of all the sides to find the perimeter. Write down the object and its perimeter in a notebook. How many objects can you find?
Perimeter Art: Create a piece of art using different shapes like squares, rectangles, and triangles. Cut out these shapes from colored paper. Arrange them on a larger sheet of paper to make a picture. Measure the perimeter of each shape and write it down next to the shape. Can you create a picture where all the shapes have the same perimeter?
Perimeter Story: Imagine you are helping a friend build a fence around their garden. Draw a picture of the garden and label the lengths of each side. Write a short story about how you helped your friend calculate the perimeter to know how much fencing to buy. What challenges did you face, and how did you solve them?
Sure! Here’s a sanitized version of the YouTube transcript:
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Hello everyone! Today we’re going to explain how to find the perimeter of a polygon. Many of you may be wondering what the perimeter is and what it represents. The perimeter is the sum of the lengths of the sides of a geometric figure. It is a measure of the distance around the figure, which is why it’s expressed in units such as feet, inches, or miles.
To find the perimeter of a figure, we simply add the lengths of each of its sides. Let’s look at an example. This triangle has three sides measuring 12, 14, and 10. To find its perimeter, we add 12 plus 14 plus 10, which equals 36 inches. Great! This triangle has a perimeter of 36 inches.
Now, let’s consider a square with four equal sides, each measuring 20 feet. To find its perimeter, we can use two strategies: we can add 20 plus 20 plus 20 plus 20, which equals 80, or we can multiply the number of sides (4) by the length of one side (20 feet). Either way, this square has a perimeter of 80 feet.
In architecture or construction, knowing the perimeter is very important for calculating the amount of material needed, among other things.
Now, let’s look at an example. Anna wants to put a fence around the vegetable garden she built in her yard. The garden has a rectangular shape and measures 6 feet wide and 10 feet long. How many feet of fencing material does she need to buy?
To figure it out, we need to find the perimeter of this rectangle. We can add 6 plus 6 plus 10 plus 10, which equals 32, or we can multiply two sides by 6 feet and two sides by 10 feet. That gives us 2 times 6, which equals 12, and 2 times 10, which equals 20. Adding those results gives us 12 plus 20, which equals 32. So, Anna needs to buy 32 feet of fencing material for her vegetable garden.
Let’s look at another example. John wants to glue a white tape around his pool to separate it from the grass. The pool has sides measuring 16 feet, 36 feet, 29 feet, 23 feet, 13 feet, and 13 feet. How many feet of tape does he need to buy?
To find out, we need to calculate the perimeter of this geometric figure by adding all its sides: 16 feet plus 36 feet plus 29 feet plus 23 feet plus 13 feet plus 13 feet, which equals 130. So, John needs to buy 130 feet of white tape to glue around his pool.
As you can see, knowing how to find the perimeter is very important and also quite simple. How about trying another example? Grab a measuring tape and find the perimeter of your room!
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This version maintains the educational content while removing any informal language and ensuring clarity.
