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- The problem of pi in junior middle school of mathematics
The problem of pi in junior middle school of mathematics
If the circumference of a square is x and the circumference of a circle is x,
(x4×x4):[π(x2π)2]，
=x2 16:[πx24π2]，
=x2 16:x24π，
=(x 2 16× 16π):(x 24π× 16π)，
=πx2:4x2，
=π:4;
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