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Pi day lasts about 3 days, 3 hours, and 24 minutes

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https://m.youtube.com/watch?v=TlY-Sh9Rzashttps://m.youtube.com/watch?v=TlY-Sh9Rzas

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Hi Yit Yi, what is pi?

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Who is William Jones and how did he come up with the idea of pi

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Area of circle= 2 x pi x radius

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We wonder how can they measure the curved part of the circle?

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Area is pi x r x r not pi x d

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Is pi=to anything else than 3.14or 22/7?

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Is pi spelled like pi or pie?

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I wonder why are circles called circles?

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How people at real life measure the length of buildings?

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Area of circle=pi x r x r.  WARNING! Do Not mix up c and area as pi x d is not equal to pi x r x r

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I know that pi = 22/

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I think to find circumference u have to look at the question’s pi and times it to the diameter which is radius times 2, am I right?

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6 Integrity: Formula of circumference of circles

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6 Integrity: Formula of circumference of circles

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Circumference of a circle = pi x d (or 2 x pi x r)

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What does the topic make us want to explore?

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What puzzles or questions do we have about the topic?

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What do we think we know about the topic?

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I know that pi has a value of 3.14.

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Ms See: More ways of finding centre of a circle!

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Ms See: More ways of finding centre of a circle!

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Dear children,

Just when I thought there are only two ways of finding a circle’s centre, I can across the following link!

https://www.google.com.sg/amp/s/m.wikihow.com/Find-the-Center-of-a-Circle%3famp=1

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Dear Donovan,

Thank you for your wonderful question! I have learnt something because of you! :)

https://en.wikipedia.org/wiki/Circumference

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The man who invented the great pi :)

https://www.historytoday.com/patricia-rothman/william-jones-and-his-circle-man-who-invented-pi

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Ms See: How we can create a circle out of a piece of paper!

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Ms See: How we can create a circle out of a piece of paper!

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Dear children,

Do you know how we can create a circle from a piece of paper?

The following is quite unbelievable! :)

https://www.youtube.com/watch?v=42So4AjsRaE

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Donovan: Why is the perimeter of a circle called the circumference of a circle too?

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Donovan: Why is the perimeter of a circle called the circumference of a circle too?

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Dear professors,

Look what I've found!

The following videos show different ways of determining the centre of a circle.

https://www.youtube.com/watch?v=gB3OKYWBEqg

https://www.youtube.com/watch?v=C5s30Y4FGX0

I wonder if there are more ways of finding a circle's centre!

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Ariel: How do we find the centre of a circle?

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Ariel: How do we find the centre of a circle?

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Many of us had the above wondering and some of our classmates mentioned that pi = 22/7 and 3.14. Thus, as a class, we set out to investigate about pi and also find out if what our friends said was true and what made them true. Ms See got us to measure real-life objects with circular surfaces to determine their respective circumference and diameter. From there, we went to find out if there is a relationship between the two.

We found the following:

When we divided the circumference of a circle by its diameter, most of us got the answer of about 3.14.

Some of us obtained a value of more than 3.14 and Nifaal suggested that there is a need to measure the circumference of the circle and its diameter a few more times to increase the accuracy of our results. We could have made some errors while taking the measurements. (Hmmm... What do we think could have resulted in the errors?)

Ms See also got us to predict whether the circumference of the circular surface or the height of the cylindrical object would have a larger value and she got us to measure the height of our object too. For the Poppadom chips container, we were rather surprised that the circumference had a larger value even though the container was very tall! This was verified by Enrique who did not believe what Yu Xuan had shared and Jerlyn then remarked that we should not judge a book by its cover. How true indeed!

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Happening daily:
http://www.chinadaily.com.cn/a/201801/03/WS5a4c142ba31008cf16da4b7e.html

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William Jones invented pi

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Hi, 6 Integrity!

Look what I've found about circles in real world:

https://www.livescience.com/26540-crop-circles.html

Something that puzzles me is how crop circles are made.