Respuesta :

miadudg
[tex]2 \pi r = circumference[/tex]
so,
[tex] \frac{circumference}{2 \pi } = radius[/tex]

it equals 12.49 or 12.5 depending on rounding


I hope this helps!
JeanaShupp

Answer: 25 inches.

Step-by-step explanation:

The circumference of a circle is given by :-

[tex]C=\pi d[/tex], where d is the diameter.

Given : A dartboard has a circumference of 78.5 in.

Then, we have

[tex]\pi d=78.5[/tex]

We put [tex]\pi=3.14[/tex] in the above equation, we get

[tex](3.14) d=78.5\\\\\Rightarrow\ d=\dfrac{78.5}{3.14}\\\\\Rightarrow d=25[/tex]

Hence, the diameter of the dart board = 25 inches.

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