Question

The radius, diameter, or circumference of a circle is given. Find the missing measures. Round to the nearest hundredth if necessary.

d = 16.4 km., r = ? , C = ?

Answer 1

I know that r=3.28 but i dont know how to find c. please help? :(

Answer 2

\[C=2\times\pi\times r\\C=\pi\times d\\r=\frac d2\\r=\frac C{2\pi}\\d=2r\\d=\frac C\pi\]

Answer 3

can you put the numbers in? so i can get a real clear visual to work on the same problem as this one. i did it wrong

Answer 4

\[2r=d\\2r=16.4km\\r=8.2km\]
\[C=2\times\pi\times r=2\times\pi\times8.2km\approx51.522km\]

Answer 5

thank you thank you!!

Answer 6

no problem :)

Answer 7

this helped alot. now i know exactly what to do :)

Answer 8

glad to know :D