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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?
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?
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?
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 ?
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 ?
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 ?
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 ?
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 ?
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 ?
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 ?
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 .
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