Question 842366
the formula for circumference is:
{{{ C = 2*pi*r }}}
{{{ 10*pi = 2*pi*r }}}
Divide both sides by {{{ 2*pi }}}
{{{ 5 = r }}}
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The formula for area is:
{{{ A = pi*r^2 }}}
{{{ A = pi*5^2 }}}
{{{ A = 25*pi }}} in2