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sergij07 [2.7K]
3 years ago
14

A dartboard has a circumference of 78.5 in.What is the diameter?

Mathematics
2 answers:
nexus9112 [7]3 years ago
5 0

Answer: 25 inches.

Step-by-step explanation:

The circumference of a circle is given by :-

C=\pi d, where d is the diameter.

Given : A dartboard has a circumference of 78.5 in.

Then, we have

\pi d=78.5

We put \pi=3.14 in the above equation, we get

(3.14) d=78.5\\\\\Rightarrow\ d=\dfrac{78.5}{3.14}\\\\\Rightarrow d=25

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

satela [25.4K]3 years ago
4 0
2 \pi r = circumference
so,
\frac{circumference}{2 \pi } = radius

it equals 12.49 or 12.5 depending on rounding


I hope this helps!
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