# GED Math : Radius and Diameter

## Example Questions

### Example Question #11 : Geometry And Graphs

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

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.

### Example Question #11 : Geometry And Graphs

Determine the diameter if the radius is .

Explanation:

The diameter is double the radius.

### Example Question #11 : Circles

Determine the diameter of a circle if the radius is  .

Explanation:

The diameter is twice the radius.

Convert the mixed fraction to an improper fraction.

### Example Question #14 : Geometry And Graphs

Determine the diameter if the radius is .

Explanation:

The diameter is twice the radius.

### Example Question #11 : Radius And Diameter

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

Explanation:

The radius is half the diameter of a circle.

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

### Example Question #16 : Geometry And Graphs

What is the radius with a diameter of ?

Explanation:

The radius is half the diameter.

Multiply the diameter by one-half.

### Example Question #17 : Geometry And Graphs

Find the radius of a circle with an area of .

Explanation:

Write the formula for the area of a circle.

Substitute the area.

Divide by pi on both sides.

Square root both sides.

### Example Question #18 : Geometry And Graphs

Find the value of the diameter if the radius is .

Explanation:

The diameter is double the radius.

Multiply the quantity by two.

### Example Question #19 : Geometry And Graphs

Determine the radius if the diameter is .

Explanation:

The radius is half the diameter.

Multiply the diameter by half.

### Example Question #11 : Geometry And Graphs

Determine the radius of the circle if the diameter is .