Chapter 6 Review

In a circle, if you calculate the circumference divided by the diameter, you always get this number...

• 
  

   $\pi$  
  

•  $1$  

•  $\sqrt{2}$  

•  $\phi$  

•  $\infty$  

Which one is the formula for circumference? Check all that apply!

• $C=2\pi r$

• $C=\pi r^2$

• $C=d\times\pi$

• $C=2\pi d$

What is the approximate circumference of a circle with radius 5 cm? Round to 1 decimal place. Do not use units.

What is the radius of a circle whose circumference is  $24\pi$  ?

This part of a circle is perpendicular to a tangent line at the point of tangency.

All angles inscribed in a semicircle have a measure of this....

The measure of an inscribed angle is _____ the measure of the intercepted arc.