ISEE Mathematics Achievement Question 45: Answer and Explanation
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Question: 45
3. Find the area of a circle whose diameter is 6".
- A. 29.26
- B. 28.26
- C. 27.96
- D. 27.26
Correct Answer: B
Explanation:
The correct answer is (B). The area of a circle is A = πr2; the radius equals 
the diameter. r = 3, and 
, or 3.14.
A = πr2
A = π(3)2
A = 9π
A = 9(3.14) = 28.26 sq. in.