| a) |
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b) |
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$k_2^2=($ 20 $\,\rm{mm})^2-($ 12 $\,\rm{mm})^2$ $k_2^2=$ 400 $\,\rm{mm}^2-$ 144 $\,\rm{mm}^2$ $k_2^2=$ 256 $\,\rm{mm}^2$ $k_2=$ 16 $\,\rm{mm}$ |
|
$a$
|
$b$
|
$c$
|
|
$12$
|
$35$
|
37
|
|
20
|
$99$
|
$101$
|
|
$15$
|
112
|
$113$
|
|
$39$
|
$80$
|
89
|