Question

spiral review

1. this circle has a diameter measurement of 5 centimeters.

which measurement is closest to the circumference
of the circle in centimeters?
a. 6.25 centimeters
b. 7.85 centimeters
c. 15.7 centimeters
d. 25 centimeters

Explanation:

Step1: Recall the formula for the circumference of a circle

The formula for the circumference \( C \) of a circle is \( C=\pi d \) (where \( d \) is the diameter) or \( C = 2\pi r \) (where \( r \) is the radius). Here, we know the diameter \( d = 5 \) centimeters.

Step2: Substitute the diameter into the formula

Using \( C=\pi d \), and taking \( \pi\approx3.14 \), we substitute \( d = 5 \) into the formula: \( C=3.14\times5 \).

Step3: Calculate the result

\( 3.14\times5 = 15.7 \) centimeters.

Answer:

C. 15.7 centimeters