GED Math Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

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!

Practice this question and more.

Which formula represents the circumference of a circle?

A = πr²
P = 2l + 2w
c = πd
r = d/2

The correct answer is: c = πd

The formula that represents the circumference of a circle is indeed c = πd, where c stands for circumference and d stands for the diameter of the circle. This formula indicates that the circumference is proportional to the diameter with π (pi) being the constant of proportionality, which is approximately 3.14. This relationship is fundamental in geometry, as it allows us to calculate the distance around a circle based on its diameter. The other formulas provided do not relate to the circumference of a circle. For instance, A relates to the area of a circle, calculated using the radius (r). The formula B represents the perimeter of a rectangle, calculated by adding twice the length and twice the width. Option D describes the relationship between radius and diameter, whereby the radius is half of the diameter, but it does not give a measure for the circumference itself.