Question

Given a line segment with a length of 40 cm, what is the circumference of a circle with a diameter of 40 cm?

A. 177.8 centimeters
B. 643 centimeters
C. 50.3 centimeters
D. 51.1 centimeters

Answer 1

To find the circumference of a circle with a diameter of 40 cm, multiply the diameter by pi (π) which is approximately 3.14.Therefore, the circumference of the circle is approximately 125.6 cm.

Step-by-step explanation:

To find the circumference of a circle with a diameter of 40 cm, we can use the formula C = πd, where C is the circumference and d is the diameter.

In this case, the diameter is 40 cm, so we can substitute this value into the formula:

C = π(40) = 40π

Using the approximation π ≈ 3.14, we can calculate:

C ≈ 40 × 3.14 = 125.6 cm

Therefore, the circumference of the circle is approximately 125.6 cm.