before humans discovered gravity were we just floating around...?

No, gravity still existed before humans discovered it.

1/8 is actually half of 1/4. Interesting! That might sound strange because 8 is 2 times 4. But remember we are talking about fractions. If you imagine a pie that has been divided into 4 equal pieces and a pie of the same size that is divided into 8 equal pieces, each piece of the second pie is going to be half the size of the pieces in the first pie. Think of it another way with only one pie. If you cut the pie into quarters (1/4) so you have 4 equal pieces of pie, and then cut each of those quarter pieces in half, you would have 8 pieces of the pie - each slice is now one eighth (1/8) of the pie. As you cut the quarter (1/4) in half, the eighth (1/8) is half the size of the quarter. Did that help?

From 0:01 to 1:35 why didn't she use a pizza as the representation.

Pizza or pie, they're both *circles*. So it doesn't matter which of those we use as a circle representation.

how do i divide a pentagon into 10 equal shares?

If it's a regular pentagon, you can first trace a line from each vertex to the center. This splits it into 5 triangles. Then, draw a line connecting the halfway point of the outside side of these triangles to the center. This creates ten equal right angled triangles.

Main content

Arithmetic

Course: Arithmetic > Unit 4

Lesson 1: Fractions intro

Cutting shapes into equal parts

Name: Cutting shapes into equal parts
Uploaded: 2016-06-13T15:55:42Z
Description: Lindsay figures out if 4 pieces of pie are each equal to 1/4 of the pie.

CCSS.Math:

3.G.A.2

3.NF.A.1

Google Classroom

Lindsay figures out if 4 pieces of pie are each equal to 1/4 of the pie. Created by Lindsay Spears.

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pearsoa2
Posted 4 years ago. Direct link to pearsoa2's post “before humans discovered ...”
before humans discovered gravity were we just floating around...?
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(20 votes)
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- Wei Wuxian
  Posted 4 years ago. Direct link to Wei Wuxian's post “No, gravity still existed...”
  No, gravity still existed before humans discovered it.
  Comment on Wei Wuxian's post “No, gravity still existed...”
  (18 votes)
leo.lin.2022
Posted 6 years ago. Direct link to leo.lin.2022's post “is 1/4 = to 1/8?”
is 1/4 = to 1/8?
Button navigates to signup pageComment on leo.lin.2022's post “is 1/4 = to 1/8?”
(6 votes)
Answer
- authentic8
  Posted 6 years ago. Direct link to authentic8's post “1/8 is actually half of 1...”
  1/8 is actually half of 1/4. Interesting!
  
  That might sound strange because 8 is 2 times 4. But remember we are talking about fractions. If you imagine a pie that has been divided into 4 equal pieces and a pie of the same size that is divided into 8 equal pieces, each piece of the second pie is going to be half the size of the pieces in the first pie.
  
  Think of it another way with only one pie. If you cut the pie into quarters (1/4) so you have 4 equal pieces of pie, and then cut each of those quarter pieces in half, you would have 8 pieces of the pie - each slice is now one eighth (1/8) of the pie. As you cut the quarter (1/4) in half, the eighth (1/8) is half the size of the quarter.
  
  Did that help?
  Comment on authentic8's post “1/8 is actually half of 1...”
  (11 votes)
Agiboygoat
Posted 4 months ago. Direct link to Agiboygoat's post “From 0:01 to 1:35 why did...”
From
0:01
to
1:35
why didn't she use a pizza as the representation.
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(6 votes)
Answer
- Natalie Ng
  Posted 14 days ago. Direct link to Natalie Ng's post “Pizza or pie, they're bot...”
  Pizza or pie, they're both circles. So it doesn't matter which of those we use as a circle representation.
  Comment on Natalie Ng's post “Pizza or pie, they're bot...”
  (2 votes)
KhilynT
Posted 4 months ago. Direct link to KhilynT's post “i don't got a question”
i don't got a question
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(5 votes)
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- regal.armstrong
  Posted 2 days ago. Direct link to regal.armstrong's post “no body has a question.”
  no body has a question.
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  (1 vote)
daberechi egeonu
Posted 4 years ago. Direct link to daberechi egeonu's post “What is the line between ...”
What is the line between fractions called?

It's called the vinculum, but it can also be called the fraction bar or division bar.
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ahdadyas000
Posted 2 years ago. Direct link to ahdadyas000's post “The bottom row is called ...”
The bottom row is called the denomerater.
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44968
Posted 4 years ago. Direct link to 44968's post “why do we say 2/8 when th...”
why do we say 2/8 when there is 1 pie?:'
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- Natalie Ng
  Posted 14 days ago. Direct link to Natalie Ng's post “2/8 means two out of eigh...”
  2/8 means two out of eight equal-sized pieces of a pie. It doesn't mean eight pies.
  Hope this helps you 44968!
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  (1 vote)
Nicholash1019
Posted 2 months ago. Direct link to Nicholash1019's post “huh what are you talking ...”
huh what are you talking about
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jeremyc295
Posted 3 years ago. Direct link to jeremyc295's post “hello can i do it without...”
hello can i do it without watching the video
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- roxy(:123
  Posted 10 months ago. Direct link to roxy(:123's post “Yes.Well I think you can ...”
  Yes.Well I think you can but that's what I do
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kamryn.martin
Posted 4 years ago. Direct link to kamryn.martin's post “how do i divide a pentago...”
how do i divide a pentagon into 10 equal shares?
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(1 vote)
Answer
- Hecretary Bird
  Posted 3 years ago. Direct link to Hecretary Bird's post “If it's a regular pentago...”
  If it's a regular pentagon, you can first trace a line from each vertex to the center. This splits it into 5 triangles. Then, draw a line connecting the halfway point of the outside side of these triangles to the center. This creates ten equal right angled triangles.
  Button navigates to signup page
  (4 votes)

Video transcript

- [Voiceover] Is each piece equal to 1/4 of the area of the pie? So we have a pie, and it has one, two, three, four pieces. So it does have four pieces. So is one of those pieces equal to 1/4 of the pie? Well let's talk about what we mean when we have a fraction like 1/4. The one in the fraction, the numerator, represents a number of pieces. So here, one piece. One piece of pie. And then the four, when we're talking about fractions is always talking about the number of equal size. Equal size pieces. So in this case four equal size pieces. So the question is, is each piece one of four equal size pieces? Let's look at the pie. I think it's pretty clear that these pieces on the end are not equal, they are smaller than the two pieces in the middle. If you love cherry pie, you are not happy about getting this end piece. Because it is smaller. It is not an equal size piece. So yes, each piece is one out of four pieces. But it is not one of four equal size pieces. Therefore it is not 1/4. So our answer is no. No, no, no. Each piece is not 1/4 or an equal share of the pie.

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