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January 31, 2015

January 31, 2015

Posted by **Tristan** on Monday, November 28, 2011 at 9:19am.

- Geometry -
**Steve**, Monday, November 28, 2011 at 10:43amThe radius of the circle is given by

2*pi/3 * r = 63

r = 30

So, the area of the 1/3 of the flower bed to be planted is

pi/3 * r^2 = pi/3 * 900 = 943 sq in.

If the marigolds are planted in a rectangular grid, that allocates 64 sq in per flower, so you'd need about

943/64 = 15 marigolds.

Of course, an 8" square grid means that diagonally opposite flowers are about 11.2" apart. If you plant them in a triangular lattice of side 8", then you'd have somewhere 20 around flowers, depending on how they were arranged

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