Shadowing Practice: How to Find Area and Perimeter | Educational Rap for Math Curriculum - Learn English Speaking with Video

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It's the year 2060 and you're colonizing Mars.
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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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Vocabulario y notas de pronunciación para esta lección

Esta lección de conversación de nivel B1 se basa en el vídeo “How to Find Area and Perimeter”. Las palabras que más se repiten: unit, square, perimeter, plus, add. Este vídeo tiene 50 frases y 501 palabras para practicar shadowing. La parte hablada dura 3:11. El hablante habla a un ritmo natural de unas 157 palabras por minuto, cercano a una conversación cotidiana. El 84 % de las palabras está entre las 3.000 más comunes del inglés; conviene repasar el resto antes de empezar.

Vocabulario clave de este vídeo

Las 13 palabras más avanzadas del vídeo, con su pronunciación y significado:

PalabraPronunciaciónSignificado
perimeter sustantivo/pɪˈɹɪm.ɪ.tə/perímetro
width sustantivo/ˈwɪtθ/anchura, ancheza
backyard sustantivo/bækˈjɑːd/traspatio, patio trasero
formula sustantivo/ˈfɔː.mjʊ.lə/fórmula
fence sustantivo/fɛns/cerca, cerramiento
intense adjetivo/ɪnˈtɛns/intenso
angle sustantivo/ˈæŋ.ɡəl/ángulo
hurry verbo/ˈhʌ.ɹi/apresurarse, apurarse
starve verbo/stɑɹv/morir de hambre
multiply verbo/ˈmʌltɪplaɪ/multiplicar, amochiguar
rectangle sustantivo/ˈrɛktæŋɡl̩/rectángulo
lengthen verbo/ˈlɛŋθən/alargar, elongar
colonize verbo/ˈkɑlənaɪz/colonizar

Phrasal verbs que vas a escuchar

PalabraSignificado
add up verboadicionar
find out verboaveriguar, anoticiarse

Gramática en este vídeo

Las estructuras que más usa el hablante, con las palabras exactas del vídeo:

EstructuraEn el vídeo
Futuro con “will” will + verbo — una decisión, una promesa o una predicciónyou'll be · that'll take · I'll need
Present continuous am/is/are + -ing — algo que ocurre ahora o en estos díasyou're colonizing · we're using · is starving
Obligación: must / have to / need to decir que algo es necesariohave to find · need to hurry

Pronunciación a tener en cuenta

El hablante usa 11 contracciones y formas reducidas, como you'll, you're, can't. Dilas en su forma corta, tal como las oyes.

  • Los sonidos de “th”: width /ˈwɪtθ/, lengthen /ˈlɛŋθən/

Cómo practicar con este vídeo

  1. Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
  2. Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
  3. Grábate y compara con el original, prestando atención a palabras como perimeter, width, backyard.

¿Qué es la Técnica de Shadowing?

Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.

Técnica de shadowing: lee la guía completa paso a paso →