6.7ab Circumference/Pi Day 2

What is this called?

• Chord

• Diameter

• Radius

• Center

What word best describes this?

• Chord

• Diameter

• Radius

• Center

What word best describes this part of a circle?

• Chord

• Radius

• Diameter

• Center

The _____________ of the circumference of a circle to its diameter is pi.

• Chord

• Ratio

• Diameter

• Radius

What is an approximation for $\pi$ ? 

•  $\frac{7}{22}$  

•  $\frac{diameter}{circumference}$   

•  $\frac{22}{7}$  

• 3.41

Which of the following represents an approximation of pi $\pi$  ?  You must select all correct answers.

• 3.14

•  $\frac{22}{7}$  

• 3.41

•  $\frac{18.84}{6}$  

Which situation would gather data in order to derive the approximation for pi ( $\pi$  )

• Determining how many one inch cubes fin into a container

• Measuring the circumference and diameter of several difference sized circles.

• Determining the number of tiles needed to cover a surface.

• Measuring the length of a piece of string used to wrap around a  polygon.

 $\frac{\left(circumference\ ofa\ circle\right)}{\left(diameter\ of\ a\ circle\right)}=$  

• Pi

• chord

• area

• radius

Which equation would be used to find the circumference of a circle with a radius of 40 feet?

• $c=20\pi$

• $C=200\pi$

• $C=80\pi$

• $C=\ 40\pi$

Timothy has a circular window in his house that has a diameter of 26 inches. Identify all of the true statements.

• The radius of a window is 52 inches.

• The circumference of the window is approximately 163 inches.

• The circumference of the window is approximately 82 inches.

• The radius of the window is 13 inches.