Relationship Between the Circumference and Diameter of a Circle

Which of the following best describes the value of pi?

• The relationship between the circumference and diameter

• The relationship between the circumference and radius

• The relationship between the diameter and radius

• The relationship between the circumference and center

Steven purchases a bowl. The diameter of the
bowl is 14 cm. What is the circumference of the 
bowl?

• 28 cm

• 43.96 cm

• 87.96 cm

• 7 cm

A Circle has a diameter of 18 meters. What is the circumference of the circle? (Best Choice)

• 9π or about 28.26 m

• 18π or about 56.52 m

• 81π or about 254.34m

• 324π or about 1017.36 m

Which equation would you use to find circumference?

• πr²

• πd

• 2r

• ½d

Mathematical Equivalence

ON

Pi is the ratio of a circle's​ (a)   to its ​ (b)   .

• circumference

• diameter

• pi

• irrational number

• radius

• pie

• perimeter

Is the relationship between diameter and circumference proportional? ​ (a)   , because ​ ​ (b)  

• Yes

• No

• circles have curved lines

• the graph does not start at the origin

• the constant of proportionality is pi

• the constant of proportionality is the radius

The relationship between circumference and diameter will always be ​ (a)   . When graphing this relationship, the constant of proportionality will always be approximately ​ (b)  

• proportional

• 3.14

• not proportional

• 1

• 2

Pi is the ratio of a circle's ​ (a)   to its ​ .

• circumference

• diameter

• radius

• center

• height

• weight

• length

• grade point average

Pi is the ​ (a)   of a circle's ​ (b)   to it's ​ (c)  

• ratio

• circumference

• diameter

• version

• radius

• chord

• area

• Pi