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Why does the circle area formula work? By Nathan Wright and Justin Dreyer Friday 6 th march
7

Nathan And Justins Circles

Jun 10, 2015

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John Dalesio
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Page 1: Nathan And Justins Circles

Why does the circle area formula work?

By Nathan Wright and Justin Dreyer

Friday 6th march

Page 2: Nathan And Justins Circles

Problem

• Why does the circle area formula work ?

• How do you measure the area of a circle?

Page 3: Nathan And Justins Circles

Process

• First we coloured half the circle • Then we cut the circles • Then we placed the cut up circle in a rectangle

shape• Then we learnt how to measure the area.

Page 4: Nathan And Justins Circles

Challenge

• We found it hard to understand the explanation

• We also found out it was hard to make the right shape

Page 5: Nathan And Justins Circles

Solution

Page 6: Nathan And Justins Circles

Circle cut and glued in to a rectangle shape

Page 7: Nathan And Justins Circles

Thank you for watching