Guys bantu gw donk nyelesain masalah ini nomer 22 23 24.... Question from @ditoprasetya27

October 2018 2 26 Report

Guys bantu gw donk nyelesain masalah ini nomer 22 23 24

dimasrizqi11 22. 2122,64 = 3,14. r.r
      2122,64= r²
   3,14
   676 = r²
    √676 = r
   26 = r
23. 1/9 . 3,14.(81/2). (81/2)
   = a. 572,265

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Asruul Nomor 22 = D
$$\begin{align} r &= \sqrt{ \frac{L}{ \pi } }\\
&= \sqrt{ \frac{2.122,64}{3,14} } \\
&= \sqrt{676}\\
&= 26\end{align}$

Nomor 23 = A
$$\begin{align}LJ&= \frac{\alpha}{360}~\times L\odot\\
&= \frac{40}{360}~\times \pi r^2\\
&= \frac{1}{9}~\times 3,14 \times 40,5^2\\
&= \frac{1}{9}~\times 5.150,385\\
&= 572,265~cm^2 \end{align}$

Nomor 24 = C
180 - 82 - 34 = 64
(Perhatikan gambar)

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