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Example Questions
Example Question #1 :Diameter
Letrepresent the area of a circle andrepresent its circumference. Which of the following equations expressesin terms of?
Possible Answers:
Correct answer:
Explanation:
The formula for the area of a circle is, and the formula for circumference is. If we solve for C in terms of r, we get
.
We can then substitute this value of r into the formula for the area:
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