M1T1: Exploring the Ratio of Circle Circumference to Diameter

Use a string and a centimeter ruler to measure the radius and circumference of circle A. Calculate the ratio of the circumference of the circle to its diameter. The ratio should be approximately.

• 3.14

• 2.5

• 4.0

• 2.0

Use a string and a centimeter ruler to measure the radius and circumference of circle B. Calculate the ratio of the circumference of the circle to its diameter.

(a)  

Use a string and a centimeter ruler to measure the radius and circumference of circle C. Calculate the ratio of the circumference of the circle to its diameter.

• 3.14

• 2.71

• 1.62

• 4.00

Use a string and a centimeter ruler to measure the radius and circumference of circle D. Calculate the ratio of the circumference of the circle to its diameter.

(a)  

Use a string and a centimeter ruler to measure the radius and circumference of circle E. Calculate the ratio of the circumference of the circle to its diameter.

(a)  

Use a string and a centimeter ruler to measure the radius and circumference of circle F. Calculate the ratio of the circumference of the circle to its diameter.

• 3.14

• 2.71

• 1.62

• 4.00

For each question, write a ratio that represents the value of π. For Questions 1 – 4, determine the circumference of the circle. Use 3.14 for π. 1. The circumference of a circle is C, and the diameter of the circle is 24. Write the ratio: C/24

• 75.36 units

• 48 units

• 12.56 units

• 37.68 units

The circumference of a circle is C, and the diameter of the circle is 9.2. Write the ratio: C/9.2

• 28.89 units

• 3.14 units

• 18.4 units

• 9.2 units

For each question, write a ratio that represents the value of π. For Questions 1 – 4, determine the circumference of the circle. Use 3.14 for π. 3. The circumference of a circle is C, and the radius of the circle is 7. Write the ratio: C/14 Circumference: ______ units

• 43.96 units

• 21.98 units

• 14 units

• 28 units

For each question, write a ratio that represents the value of π. For Questions 1 – 4, determine the circumference of the circle. Use 3.14 for π. 4. The circumference of a circle is C, and the radius of the circle is 1.2. Write the ratio: C/2.4

• 3.77 units

• 2.51 units

• 1.57 units

• 4.25 units