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UNIT TEST:
Circles and Composite Figures
Calculator
What is the circumference of a circle with a radius of 7.9 inches?
Use 3.14 for pi.
Enter your answer as a decimal in the box.
49. in.
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Sagot :

To solve the problem of finding the circumference of a circle with a given radius of 7.9 inches, follow these steps:

1. Identify the Given Information:
- Radius ([tex]\( r \)[/tex]): 7.9 inches
- Pi ([tex]\( \pi \)[/tex]): 3.14

2. Understand the Formula for Circumference:
The formula for the circumference ([tex]\( C \)[/tex]) of a circle is given by:
[tex]\[ C = 2 \pi r \][/tex]

3. Plug in the Given Values:
Replace [tex]\( \pi \)[/tex] with 3.14 and [tex]\( r \)[/tex] with 7.9 inches in the formula:
[tex]\[ C = 2 \times 3.14 \times 7.9 \][/tex]

4. Calculate the Circumference:
Multiply the values step by step:
[tex]\[ C = 2 \times 3.14 \times 7.9 = 49.612 \][/tex]

Therefore, the circumference of the circle is [tex]\(\boxed{49.612}\)[/tex] inches.