Describing Pi

T.i.P.S.

Students should understand the relationships between circumference, diameter, and π. by gathering data and comparing the circumference to the diameter of various circles. Students may have to determine how to find the radius or diameter when given the circumference. Students should understand that answers may be as exact with π on the answer rather than getting an approximation.

Example

In the following circle, how could the relationship of π be represented?

Hint
Possible Solution

TEKS

Supporting Standard 7.5 Proportionality. The student applies mathematical process standards to use geometry to describe or solve problems involving proportional relationships. The student is expected to:

(B) describe π as the ratio of the circumference of a circle to its diameter

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