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Camilla & Lauren Circle Reflection

Date post: 10-Jun-2015
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Why does circle area formula work? By Lauren and Camilla 06.03.09
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Page 1: Camilla & Lauren Circle Reflection

Why does circle area formula work?

By Lauren and Camilla06.03.09

Page 2: Camilla & Lauren Circle Reflection

Problem:

• The formula for a rectangle is A = L x W• The formula for a circle is A= πr2

Page 3: Camilla & Lauren Circle Reflection

Process:

• First we colored in half of a circle.• Then we cut all the small segments.• Then we stuck them on the another piece of

paper so that it formed rectangle.• And a method was worked out.

Page 4: Camilla & Lauren Circle Reflection

Challenges:

• The challenges that we faced were that we didn’t cut the segments small enough so that the rectangle formed wasn’t exactly perfect.

• It also was difficult to work out the formula from a rectangle to a circle.

Page 5: Camilla & Lauren Circle Reflection

Solution:• A = L x W• A= C⁄2 x r• A= πd/2 x r• A = π2r ⁄2 xr• A = πr x r• A = πr2


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