Question 919948
Find the sum of the circumferences.
{{{2*pi*(12/2)+2*pi(8/2)}}}
{{{20pi}}}
That is the circumference of the large circle from the two smaller circles.


Diameter:
{{{2pi*R=20pi}}} where R is the RADIUS.
{{{R=10}}}
that means, we want twice R because that would be the diameter.
{{{highlight_green(2*R=highlight(20))}}}