First, try to use your own sense.(adsbygoogle = window.adsbygoogle || []).push({});

Take a twine (rope) and put it around a ball, or an orange (sphere).

Now you have the circumference (perimeter) of that sphere.

Take this twine and add 1m more (one more meter - it can be any unit of liner measure).

Put this one meter longer twine around the ball again, keeping it equidistant of the surface (circular orbit, ring).

The twine is aprox. 0,159m of the surface of the ball.

Take a twine (rope) and put it around the earth equator (sphere).

Now you have the circumference (perimeter) of that sphere.

Take this twine and add 1m more (one more meter - it can be any unit of liner measure).

Put this one meter longer twine around the earth equator again, keeping it equidistant of the surface (circular orbit, ring).

The twine is aprox. 0,159m of the surface of the earth.

Why does it hapen like this?

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# Perimeter and radius

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