High School Math : High School Math

Study concepts, example questions & explanations for High School Math

varsity tutors app store varsity tutors android store

Example Questions

Example Question #4 : How To Find The Circumference Of A Circle In Pre Algebra

If the circumference of a circle is , what is the radius of the circle?

Possible Answers:

Correct answer:

Explanation:

The formula for the circumference of a circle is .

The problem gives us the circumference, so plug that in:

Notice that the 's cancel out:

Divide both sides by :

Example Question #5 : How To Find The Circumference Of A Circle In Pre Algebra

If the circumference of a circle is , what is the diameter of the circle?

Possible Answers:

Correct answer:

Explanation:

The diameter of the circle is twice the radius, or . We first need to find the radius using the information that has been given to us.

The formula for the circumference of a circle is .

The problem gives us the circumference, so plug that in:

Notice that the 's cancel out:

Divide both sides by :

Plug that into our first equation:

Example Question #7 : How To Find The Circumference Of A Circle In Pre Algebra

If the diameter of a circle is , what is the circumference? 

Possible Answers:

Correct answer:

Explanation:

The formula for circumference is . The problem gives us the diameter instead of the radius, so we need to convert.

The diameter is twice the radius or .

This means that, for this circle, .

Divide both sides by :

Plug this value into our initial equation to solve:

Example Question #8 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for circumference of a circle is .

Plug in our given information and solve.

Example Question #9 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for circumference of a circle is .

Plug in our given values.

Example Question #4 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for circumference of a circle is .

Plug in our given values.

 

Example Question #11 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for circumference of a circle is .

Plug in our given values.

Example Question #12 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

The formula for the circumference is .

Plug in our given radius and solve.

Example Question #13 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

To find the circumference of a circle given the radius we must first know the equation for the circumference of a circle which is 

We then plug in the number for the radius into the equation yielding

 

We multiply to find the value for the circumference is .

The answer is .

Example Question #11 : How To Find The Circumference Of A Circle In Pre Algebra

What is the circumference of a circle with a radius of ?

Possible Answers:

Correct answer:

Explanation:

To find the circumference of a circle we must first know the equation for the circumference of a circle, which is .

We then plug in the given value for the radius, yielding .

We multiply to find the value for the circumference is .

Thus answer is .

Learning Tools by Varsity Tutors