Shadowing Practice: How to Find Area and Perimeter | Educational Rap for Math Curriculum - Learn English Speaking with Video
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50 sentences
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1
It's the year 2060 and you're colonizing Mars.
2
You're about to buy a plot of land, but you have a dog and you want to make sure he has enough space to run around.
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You also want to build a fence so he can't escape.
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So first you want to know how big the backyard is, and then you want to know how far it is around.
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To figure this out, you have to find.
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Just add the sides together and then you'll be great.
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With the area, that's the space inside.
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For a rectangle, it's lengthened with a multiply and perimeter.
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The distance around a shape.
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Just add the sides together and then you'll be great.
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Yeah, here I am on Mars, trying to find out the size of my backyard.
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Well, it's a rectangle, right?
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So what if we cut it into squares of the same size?
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That are one unit long by one unit wide.
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These are called square units.
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Add them all up.
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Surprise!
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You got 72 square units or feet cause that's the unit we're using.
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Well who has time to count squares?
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Blank times width is the quickest way to get there.
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Yeah, that's how you find the area.
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A nice little formula that'll take care of you.
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And I need to hurry cause my dog is starving.
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Let's find the area so I can feed Marvin.
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My yard is 9 feet long by 8 feet wide.
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I get the area when I multiply each side.
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9 times 8 is 72.
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But here's another way for you to think it through.
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Basically you take the rows, and figure how many square units fit inside of those.
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Yo, my backyard is wide, 8 feet, so that's 8 rows with 9 square units in each.
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So multiply the 8 rows by the 9 square units, you get 72, yup, you knew it.
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Area, that's the space inside, for a rectangle it's lengthened with a multiplied and perimeter.
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The distance around a shape, just add the sides together and then you'll be great.
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Now I've got my area for my yard on Mars, and there's plenty of room for Marvin to live large.
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But now I need a fence, cause I heard the animals on Mars could be intense.
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So I'll need the perimeter, the distance around my whole yard, how do you get it?
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You just add up the length of the sides.
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9 plus 8 plus 8 plus 9 is a perimeter of 34 feet, and oh yeah, that's regular units and not units squared.
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So let's take a look from another angle to get the perimeter of a square or rectangle.
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You add 2 widths plus 2 lengths.
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Here's a formula, don't forget to say thanks.
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2 times length plus 2 times width to get a square or rectangle's perimeter quick.
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So let's try it with my Martian backyard.
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Come on, get ready, y 'all.
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It's not that hard.
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Two times the length of 9 is 18.
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And two times the width of 8 is 16.
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And 16 plus 18 is 34.
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Now if I could stop Marvin from making a dirty floor.
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Seriously.
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Vocabulary and speaking notes for this lesson
This B1 speaking lesson is built on the video “How to Find Area and Perimeter”. The speaker keeps coming back to these words: unit, square, perimeter, plus, add. This video has 50 sentences and 501 words to shadow. The speech runs for 3:11. The speaker talks at a natural 157 words per minute, close to everyday conversation. 84% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
The 14 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| perimeter noun | /pɪˈɹɪm.ɪ.tə/ | The sum of the distance of all the lengths of the sides of an object. |
| width noun | /ˈwɪtθ/ | The state of being wide. |
| backyard noun | /bækˈjɑːd/ | A yard to the rear of a house or similar residence. |
| formula noun | /ˈfɔː.mjʊ.lə/ | Any mathematical rule expressed symbolically. |
| fence noun | /fɛns/ | A thin artificial barrier that separates two pieces of land or forms a perimeter enclosing the lands of a house, building, etc. |
| intense adjective | /ɪnˈtɛns/ | Of a characteristic: extreme or very high or strong in degree; severe; also, excessive, towering. |
| angle noun | /ˈæŋ.ɡəl/ | A figure formed by two rays which start from a common point (a plane angle) or by three planes that intersect (a solid angle). |
| blank noun | /ˈblæŋk/ | The white spot in the centre of a target; hence (figuratively) the object to which anything is directed or aimed, the range of such aim. |
| hurry verb | /ˈhʌ.ɹi/ | To do things quickly. |
| starve verb | /stɑɹv/ | To die because of lack of food or of not eating. |
| multiply verb | /ˈmʌltɪplaɪ/ | To increase the amount, degree or number of (something). |
| rectangle noun | /ˈrɛktæŋɡl̩/ | Any quadrilateral having opposing sides parallel and four right angles. |
| lengthen verb | /ˈlɛŋθən/ | To make longer, to extend the length of. |
| colonize verb | /ˈkɑlənaɪz/ | To settle (a place) with colonists, and hence make (a place) into a colony. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| add up verb | To take the sum of; to total. |
| find out verb | To discover, as by asking or investigating. |
| run around verb | To be very busy doing many different things. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Future with “will” will + verb — a decision, promise or prediction | you'll be · that'll take · I'll need |
| Present continuous am/is/are + -ing — something happening right now or around now | you're colonizing · we're using · is starving |
| Obligation: must / have to / need to saying that something is necessary | have to find · need to hurry |
Pronunciation to watch
The speaker uses 11 contractions and reduced forms, such as you'll, you're, can't. Say them the short way, as you hear them.
- The “th” sounds: width /ˈwɪtθ/, lengthen /ˈlɛŋθən/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like perimeter, width, backyard.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.