Here is a simple and elegant way of establishing the relative sizes of the earth and the moon.

Start with a 3:4:5 triangle (shown in black outline in the diagram to the right), project a 3×3 square from the shorter side and then draw another 3:4:5 triangle off the other side of the square. From the bottom line of the resultant figure, project another square, this time 11×11. Draw a circle in each of these squares.

From the 3:4:5 triangle we can calculate the following figures:

**3+4+5=12
3x4x5=60
12+60=72
12×60=720**

You will recognise **12** and **60** as being the basis of how we measure time. The figure of **72** relates to an astronomical phenomenon called precession (because of the slow wobble of the earth’s axis, the night sky appears to revolve in a complete circle but not that you would notice. It takes 72 years to move through 1° of that circle) The next figure, **720** is the one which relates to our two circles in the above diagram. Multiplying this figure by the diameters we see –

**720×3=2160
720×11=7920**

The moon has a diameter of **2160 miles**

The earth has a diameter of **7920miles.**

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**JD**‘s profile and a list of his posts can be found in the left sidebar at this site.

Piece of cake [once it’s explained].

And all that happened by chance?

I don’t buy that it is by chance.