FTCE General Knowledge Math Practice Test

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Prepare for the FTCE General Knowledge Math Test with our comprehensive quiz. Study using flashcards and multiple-choice questions, all with detailed hints and explanations. Get ready to excel on your exam!

Practice this question and more.

Which formula would you use to find the area of a circle?

(3.14)r^2
1/2PI
1/3Bh
2(3.14)(r)

The correct answer is: (3.14)r^2

The formula to find the area of a circle is indeed (3.14)r^2, where "r" represents the radius of the circle. This formula derives from the mathematical constant pi (approximately 3.14), which is crucial in calculations involving circles. By squaring the radius and multiplying by pi, you effectively calculate the total space enclosed within the boundary of the circle. The other options represent different geometric calculations unrelated to the area of a circle. Option B looks like it’s misrepresenting a formula; it seems to suggest a relation involving pi but lacks critical components necessary to calculate an area. Option C corresponds to the formula for the volume of a prism, not relevant to circles. Lastly, option D represents the formula for the circumference of a circle instead of its area. Therefore, the formula you provided accurately reflects how to determine the area of a circle.