Hi! Welcome to Math Antics. In this lesson, we’re going to learn about an important concept in Geometry called Perimeter. “Perimeter” is just a fancy math term that means the distance (or length) around a shape. …but
what exactly does the distance around a shape mean? Well… distance (or length) is a 1-dimensional quantity that we can measure with units like
centimeters, inches or miles. That means that perimeter is also a 1-dimensional quantity that we can measure with units of length. For example, the perimeter of a shape wouldn’t be just 10, but it could be 10 cm. Or, instead of being just 25, it could be 25 miles. The units are REALLY important
when you’re talking about perimeter! Okay, but what exactly do we mean by,
“around a shape”? It seems like there would be a lot of different ways
to go around a shape. Some of them would be short
the length of four of the sides. The other two are missing!
So how can we figure them out? Problems like this come up all the time in math; problems where you aren’t quite given all the information. When you have this kind of problem, the key is to use what you DO know to figure out what you DON’T know. Here’s what I mean… Look closely at the two vertical sides that we DO know the lengths of (4 inches and 6 inches) Now… imagine that those two vertical sides could be moved straight across to the other side… the side that we don’t know the length of. By doing that, you can see that the missing length would just be the combination of the two vertical lengths we DO know: 4 inches and 6 inches. And since 4 + 6=10, the missing vertical side must be 10 inches long. Notice that we can do the same thing for the horizontal sides that we do know. If we imagine those moving down to the side that we don’t know, we see that it’s length must equal the combination of those two lengths. 10 inches plus 5 inches equals 15 inches. There, we’ve used the lengths that we DID know to figure out the lengths that we DIDN’T know. And now that we know the length of ALL the sides, we can just add them all up to get the perimeter. 4 + 5 + 6=15 And then 15 + 15=30 30 + 10=40 and last of all, 40 + 10=50 So, the sum of all the sides is 50 inches.
That’s the perimeter of this shape. And that’s the end of this lesson. We’ve learned that Perimeter is the distance (or length) around a geometric shape, and we’ve learned how to calculate it for any polygon. You just add up the lengths of all the sides and the total length is the perimeter. Oh… and don’t forget your units! Also, don’t forget that to get good at math takes practice! Thanks for watching Math Antics

## 100 thoughts on “Math Antics – Perimeter”

1. to infinity and your mom says:

My Starr test is in 2 days

2. favour edie says:

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3. Lova Waldebäck says:

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4. Jawhara Gass says:

You are the best maths explainer????

5. z Snayy says:

6. jerichobono RBLX says:

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after watching

I feel calm.

7. Razortech plays says:

8. lili and cole says:

I'll pass every exam just listening to you

9. syed ali says:

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10. mariam ismail says:

6:52 u said 50, 50in.

11. RedCap 2 says:

Thank you soo much!
You sir, are a life saver

12. Giovana Pacilli says:

sense im in fourth grade in anly do the perimeter of squares but this relly help but what if it is a shape that is not normal

13. Marla says:

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14. stream stay says:

He is a Math Teacher , NOT A police OFFICER!

15. stream stay says:

80 = 7 = 500,000 KM walks around the CITY

16. OMEGA_Sim 21 says:

This is bob
?‍♂️
?
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lets see how rich can he get

17. Mintukabi Raza says:

Why would someone dislike this video.

18. Nacia Grace says:

I just helped my niece and my son with their homework using these videos! Lol thank you so much!

19. Annan Ashraf says:

1:36 lol Rob's head is looking back at us

20. nini playz says:

21. Kundan Singh says:

Can we find perimeter of cuboid and cube pz explain

22. Bmoo Bmoo says:

Thank u so much!

23. Blue Man says:

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24. Edison Arabit says:

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25. Esmeralda Rodriguez says:

I have a test and I watching before school

26. Ethan Galea says:

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27. Kellie Skerrett-Clark says:

Thank you, I can’t thank you enough. Your videos have made math enjoyable for both my son and I. I have shared with so many families.

28. Ashley deoleo says:

My state test is tomorrow… Thanjs for the help

29. Lora Plays roblox says:

Omg ? I wish you were my teacher

30. Moheeb says:

Phew! I felt worried in class about perimetres and by this lesson I was able to do my homework

31. •Ant onia• says:

♡Thx u this helped!!

32. Karla Russell says:

Nice! Easy to understand.

33. versha srivastava says:

Good

34. Fortnite Player says:

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35. Dolleen Hinds says:

World best mathematician. You are a genius??

36. michaell redbert says:

but what if they are all different sized angels and if there are 6 different sized angels

37. Cottoncandycherry Cotton says:

It very good explanation. Thank you

38. Ms. Dark Soul says:

See, how come teachers try teaching us and we never get it but when we listen on videos it’s way easier

39. Salman Ali says:

40. Elvis Galvez says:

7:28 missed to say "m"

41. Anjanette.C Elia says:

Claps Wowwww My teacher do the same subject but 30 Mins and This video is 7 mins

42. HAZZA HAMDAN HAHA 107 says:

اكو عرب بطياره

43. Murat Unal says:

This guy is awesome. If youthink he helps you, hit the like button ? below.

44. Murat Unal says:

I would get a big fat F for maths. Best math teacher. Great editing. Kinda fuuny.

45. shimaa Gazy says:

One strategy for 6:57 is to divide the shape into 2 shapes

46. Terraza Estevez says:

It si easy

47. Anneliese Iasiello says:

can you teach me plz

48. Essentialys says:

Thank you

49. Terraza Estevez says:

I love math

50. - W a z z : v - says:

Thanks! I love this channel it helps so much my math teacher uses this channel to help us learn! I reallyyyyy thanks you for helping me learn!

51. Ryan Kateregga says:

He is just remembering the things he said he is not even looking at anything ,smart guy ha

52. Ryan Kateregga says:

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53. The One And Only Flipstar says:

I love the simplicity of your videos 🙂

54. Food Luxuries says:

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55. sally B says:

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56. DarkSoaR says:

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57. 김백송 says:

아앙

58. Bryan Solache says:

thank you a lot your awesome!

59. ultragtathiccgachalife42069 123 says:

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60. emily sucks at everything says:

thank you so much, watching these videos over again really helps to remember for tests/exams. Thanks, Math Antics.

61. Saif Rahim says:

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62. Saif Rahim says:

booooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

63. killer says:

4:05 bruh moment

64. JL Games says:

who at school watching this ?

65. Ken Deng says:

useless

66. hope jezierski says:

this guy defines superhero

67. Ivy Rabelista says:

this is super helpful for my math exams

68. The three souls Mirror,Natalie and Shadow says:

So,my mom took my device away and told me to hold it later.So I turned it on and watched this while she did my hair,after you said perimeter she realized what I was watching.I actually need more practice but with this, I might be able to understand. thank you for posting this.

69. Electro crack says:

I am Going to have a god note in my final exam

70. Monster Gamerz says:

where is the video of area

71. Acithiec Akec says:

Your helping me with the perimeter

72. its kia81m the best says:

Who knew this already but just came to waste time

This is simple stuff but I learned it’s from this guy

74. Janna :3 says:

I’m done with area done with volume now to the hardest part -sigh – IM READY AS LONG AS THIS MATH GOD IS TELLING M

75. Pacmanwrecks 35 says:

Yo StudyPug is so stupid. They're like, "Tired of searching for old Youtube videos that don't help?"
SMH IM AT MATH ANTICS BISH COME AT ME >:((((

76. G Sun says:

i thought u forgot the units heehee thank u im on summer break but school stoped learning will never!

77. ibraheem hassan says:

Someone pls tell me a example of a 1 dimensional shape

78. ibraheem hassan says:

3:13 is that a right angle triangle

ᴍʏ ɢᴜʏ! ʏᴏᴜ ᴛʜᴇ ʙᴇsᴛ!

80. Harry potter fan says:

sheesh I NEVER KNEW A U TUBE CHANNEL COULD HELP ME PASS MY MATH FINALS ? WHO COULD HAVE KNOWN

81. sgsgtm says:

Teacher Rob u r d bst !!

82. Bashorun Bunmi says:

Can you make a video on angle in rotation

83. M-zigo Ltd. Company says:

Anyone have exams tomorrow ?then good luck????

84. مصطفي رجب says:

انت رائع ممكن تساعدني كيف اعمل فيديوا مثل هذا

85. Belal Uddin says:

Can you make a video of sequence pls

86. Musti The Greatest says:

Plz pray for me to pass my test.

wow mind blown!

88. Angus Zhang says:

with you i will lose my competiton

89. cyst 24 says:

28
/
2 14
/
2 7

90. rashanayakam kirubalini says:

Thk u so much sir excellent explanation.??????

91. Nia T says:

I had a test today and we were doing peremitire I watch this video on the same day and I was in the top off my class now my teacher said where did u know all this then I said math antics now we watch math antics every day to help my class with are math by the way we have the top in rock maths highest in rock maths if you have a child who needs help in maths use math antics and after I finished school I go and watch math antics every day and I get higher and higher scores

92. Lanika rahman says:

OMG I literally want him to be my math teacher at school not even my teacher cannot teach me that in 2 hours

93. diego gamboa says:

Absolutely nobody:
not a living soul:
my cringy teacher every math lesson:

4:03

94. Antonio GTYT says:

95. Antonio GTYT says:

10 plus 10=20 plus 15 =35plus5=40 4 plus 6=10 that equals 50

96. Antonio GTYT says:

You just gotta add everything up and don’t forget to show the work that you’ve done so you can get better at it and check the fails that you did in the past

97. CLAIRE SON SONSEUNGWAN says:

I hate math?Why just can't math solve its own problem? Dear Math: Grow up?