ISEE Upper Level Math : How to find the ratio of diameter and circumference

Study concepts, example questions & explanations for ISEE Upper Level Math

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Example Questions

Example Question #1 : How To Find The Ratio Of Diameter And Circumference

A circle has a radius of . What is the ratio of the diameter to the circumference?

Possible Answers:

Correct answer:

Explanation:

The information about the radius is unnecessary to the problem. The equation of the circumference is:

Therefore, the circumference is times larger than the diameter, and the ratio of the diameter to the circumference is:

Example Question #2 : Diameter

A circle has a radius of . What is the ratio of the diameter to the circumference?

Possible Answers:

Correct answer:

Explanation:

The information about the radius is unnecessary to the problem. The equation of the circumference is:

Therefore, the circumference is  times larger than the diameter, and the ratio of the diameter to the circumference is:

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