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There is a method that i found online:
This method involves summing the lengths of the hypotenuses of smaller and smaller triangles after drawing and much cutting of the circle.
https://logicgrimoire.wordpress.com/2012/09/22/how-to-calculate-the-circumference-of-a-circle-without-knowing-pi/

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Why is pie 3.14, why diameter times pie equals circumference?

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Is there a ‘half of a radius’?

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I wonder why when we take the circumference divide by diameter always give us a answer close to”pi”

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How did pi come around

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Lixuan: pie can be estimated to 3.14 or 22 out of 7.

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Lixuan: pie can be estimated to 3.14 or 22 out of 7.

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Is there a way to measure circles without using pi?

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Joel/Zi Jenn

Do I use 22/7 or 3.14 as pie

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I wonder if besides pi, there are other numbers which are also infinite

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Zi Jenn

Pie is 22 divide by7 or 3.14

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I wonder who discovered pi

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Lixuan: why must I use the pie unit to solve a circle word problem

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Lixuan: why must I use the pie unit to solve a circle word problem

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We use pi to multiply the Diameter of the circle to find its circumference

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Why is pi not a whole number

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I think I know that Pi is very important in the topic circles

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A radius is half of a diameter

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We have to use pi to multiply the diameter of a circle

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I now want to find the area of other more challenging shapes. (Like a octagon

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The circumference of a circle is the perimeter of the circle

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I now want to find the area of other more challenging shapes. (Like a octagon)

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I wonder who came up with the idea on how to measure circles

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Lixuan:you have to multiply the radius by two to get the diameter.

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Lixuan:you have to multiply the radius by two to get the diameter.

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I wonder how people measure long distance in real life

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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?