GED Math Practice Test

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Prepare for the GED Math Test with our comprehensive quiz. Practice with multiple choice questions and get detailed hints and explanations to boost your confidence and skills. Enhance your test readiness today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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If you multiply the diameter of a circle by pi (π), what do you get?

Area
Circumference
Radius
Volume

The correct answer is: Circumference

Multiplying the diameter of a circle by pi (π) gives you the circumference of the circle. The formula for circumference is expressed as $ C = \pi \times d $, where $ d $ is the diameter. This formula reflects how the circumference is directly related to the diameter, making it possible to calculate the length around the circle using just the diameter and the constant π. The other choices represent different properties of a circle or three-dimensional shapes: the area relates to the size of the circle's surface, the radius is half of the diameter, and volume pertains to three-dimensional figures, none of which can be calculated directly from the diameter in the manner described in this question.