GED Math : Radius and Diameter

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #11 : Geometry And Graphs

If the diameter of a circle is 12 feet, what is the radius in yards?

Possible Answers:

Correct answer:

Explanation:

There are three feet in one yard.

Using dimensional analysis, we can determine the given diameter in yards first.

The radius is half the diameter.

The answer is:  

Example Question #11 : Geometry And Graphs

Determine the diameter if the radius is .

Possible Answers:

Correct answer:

Explanation:

The diameter is double the radius.

The answer is:  

Example Question #11 : Circles

Determine the diameter of a circle if the radius is  .

Possible Answers:

Correct answer:

Explanation:

The diameter is twice the radius.

Convert the mixed fraction to an improper fraction.

The answer is:  

Example Question #14 : Geometry And Graphs

Determine the diameter if the radius is .

Possible Answers:

Correct answer:

Explanation:

The diameter is twice the radius.

Multiply the radius by two.

The answer is:  

Example Question #11 : Radius And Diameter

What is the radius if the diameter of a circle is ?

Possible Answers:

Correct answer:

Explanation:

The radius is half the diameter of a circle.

This is also similar to multiply diameter by one-half.

The answer is:  

Example Question #16 : Geometry And Graphs

What is the radius with a diameter of ?

Possible Answers:

Correct answer:

Explanation:

The radius is half the diameter.

Multiply the diameter by one-half.

The answer is:  

Example Question #17 : Geometry And Graphs

Find the radius of a circle with an area of .

Possible Answers:

Correct answer:

Explanation:

Write the formula for the area of a circle.

Substitute the area.

Divide by pi on both sides.

Square root both sides.

The answer is:  

Example Question #18 : Geometry And Graphs

Find the value of the diameter if the radius is .

Possible Answers:

Correct answer:

Explanation:

The diameter is double the radius.

Multiply the quantity by two.

The answer is:  

Example Question #19 : Geometry And Graphs

Determine the radius if the diameter is .

Possible Answers:

Correct answer:

Explanation:

The radius is half the diameter.

Multiply the diameter by half.

The answer is:  

Example Question #11 : Geometry And Graphs

Determine the radius of the circle if the diameter is .

Possible Answers:

Correct answer:

Explanation:

The radius is half the diameter.  To find the radius, multiply the diameter by half.

The answer is:  

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