GMAT Math : Calculating the length of the diameter

Study concepts, example questions & explanations for GMAT Math

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Example Questions

Example Question #92 : Geometry

If an ecologist is measuring species composition using a circular region with an area of , what is the diameter of the region?

Possible Answers:

Correct answer:

Explanation:

If an ecologist is measuring species composition using a circular region with an area of , what is the diameter of the region?

Recall the formula for the area of a circle:

We also know that r, the radius, is half the length of the diameter. Therefore, if we can find the radius, we can find the diameter:

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