How to find the ratio of diameter and circumference - ISEE Upper Level Mathematics Achievement
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Question
A circle has a radius of 
. What is the ratio of the diameter to the circumference?
A circle has a radius of
Answer
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:
The information about the radius is unnecessary to the problem. The equation of the circumference is:
Therefore, the circumference is
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Question
A circle has a radius of . What is the ratio of the diameter to the circumference?
A circle has a radius of
Answer
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:
The information about the radius is unnecessary to the problem. The equation of the circumference is:
Therefore, the circumference is
Compare your answer with the correct one above
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