2 years ago

Please answer number 8. I need help, I don’t understand.

Mathematics

1 answer:

Bond [772]2 years ago

6 0

Answer:

A=2πrh+2πr2 this is the surface are formula of a cylinder. You already know the scale ratio is 2.5 so the answer is (2.5*surface area formula). For the formula just plug in the values for the radius and the height that is given and solve.

Step-by-step explanation:

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If an exterior angle of a regular polygon is 21.2° how many sides does the polygon have?

rosijanka [135]

$\bf \textit{sum of all exterior angles in a polygon}\\\\
n\theta =360\quad 
\begin{cases}
n=\textit{number of sides}\\
\theta =\textit{angle in degrees}\\
----------\\
\theta =21.2^o
\end{cases}\implies n21.2=360
\\\\\\
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the reason why the value is not an integer, is most likely because the 21.2° is just an approximation.

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laila [671]

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4 years ago

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Kryger [21]

Answer:

k = 176

Step-by-step explanation:

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