Question 387456
The equation for circumference is:
{{{c=2(pi)r}}}
The equation for area is:
{{{a=(pi)r^2}}}
First, we'll find the circumference.
The 'r' in the equation stands for radius. The radius of a circle is half of its diameter, so the circle's radius is half of 6--3 inches.
So, we can substitute 3 in for 'r' and 3.14 in for {{{pi}}}
{{{c=2(pi)r}}}
{{{c=2*3.14*3}}}
Then, we can simply multiply.
{{{c=2*3.14*3}}}
{{{c=18.84}}}
Therefore, the circumference of the circle is 18.84
Next, we'll find the circle's area.
Again, we can substitute 3 in for 'r' and 3.14 in for {{{pi}}}
{{{a=(pi)r^2}}}
{{{a=3.14*3^2}}}
The, we'll square three and multiply.
{{{a=3.14*3^2}}}
{{{a=3.14*9}}}
{{{a=28.26}}}
Therefore, the circumference is 18.84 and the area is 28.26.