document.write( "Question 1025560: We use π to calculate area of circles. The ancient Egyptians had a method, documented around 1650 BC in the Rhind Mathematical Papyrus, of calculating the area of a circle without π as we now know it. They took a square with side length equal to the diameter of the circle (Figure 1), trisected each side and removed the corner triangles (Figure 2) and used the remaining octagonal shape (Figure 3) to approximate the area of the circle. Using this method, what would be the calculated area of a circle with diameter 9 units?\r
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Algebra.Com's Answer #640876 by ikleyn(52790) $\"\"$ $\"About$

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\n" ); document.write( "We use π to calculate area of circles. The ancient Egyptians had a method, documented around 1650 BC in the
\n" ); document.write( "Rhind Mathematical Papyrus, of calculating the area of a circle without π as we now know it.
\n" ); document.write( "They took a square with side length equal to the diameter of the circle (Figure 1), trisected each side and
\n" ); document.write( "removed the corner triangles (Figure 2) and used the remaining octagonal shape (Figure 3) to approximate
\n" ); document.write( "the area of the circle. Using this method, what would be the calculated area of a circle with diameter 9 units?\r
\n" ); document.write( "\n" ); document.write( " https://www.mathcounts.org/sites/default/files/u5328/Egyptian%20Circle.jpg
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document.write( " -  = 81 - 2*9 = 63 sq.units against  = 63.585 sq. inits.\r\n" );
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