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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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Considere as seguintes afirmações: I. O inverso de 0,2 é 5. II. O triplo de \frac{2}{5} é \frac{6}{15}. III. A metade de 0,5 é \
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Answer:

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Step-by-step explanation:

Recebemos declarações na questão acima para considerar.

Declaração I. O inverso de 0,2 é 5.

Matematicamente, isso é escrito como:

1 / 0,2

0,2 = 2/10

Portanto: 1 ÷ 2/10 = 1 × 10/2

= 5

Afirmação 1 é verdadeira

Declaração II.

O triplo de 2/5 é 6/15.

Triplo de 2/5 = 2/5 + 2/5 + 2/5

= 2 + 2 + 2/5

= 6/5

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Declaração II é falsa

III. A metade de 0,5 é 1/5

1/2 de 0,5

= 1/2 × 0,5 = 0,25

Convertendo em fração

= 0,25 = 25/100

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Declaração III está correta

Portanto, as afirmações verdadeiras são I e III

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