计算下面图形的周长。
(1)

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(2)

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(1) $20 \times 2+20 \times 3.14 \div 2$

$$
\begin{aligned}
&=40+31.4 \\
&= 71.4 \quad(\mathrm{~cm}) \\
& \text { (2) } 3.14 \times 9 \times 2 \times \frac{1}{4}+9 \times 2 \\
&=14.13+18 \\
&=32.13 \quad(\mathrm{~m})
\end{aligned}
$$