Which expression gives the circumference in terms of the circle's diameter?

Prepare for the WELD 101 C Test with comprehensive materials, flashcards, and multiple choice questions. Gain confidence with detailed explanations and helpful hints for all question types. Ensure success on your exam!

Multiple Choice

Which expression gives the circumference in terms of the circle's diameter?

Explanation:
The circumference scales directly with the diameter: C = πd. This comes from the standard formula C = 2πr and the fact that the diameter d is twice the radius (d = 2r). Substituting r = d/2 into C = 2πr gives C = 2π(d/2) = πd. So the expression that gives circumference in terms of the diameter is πd. The other forms don’t match circumference: πr^2 is area, 2πr uses radius, and πd^2 is not a valid circumference expression.

The circumference scales directly with the diameter: C = πd. This comes from the standard formula C = 2πr and the fact that the diameter d is twice the radius (d = 2r). Substituting r = d/2 into C = 2πr gives C = 2π(d/2) = πd. So the expression that gives circumference in terms of the diameter is πd. The other forms don’t match circumference: πr^2 is area, 2πr uses radius, and πd^2 is not a valid circumference expression.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy