Question 1141121
Put the figure between PRE tags if you want the pure text to look right.  Click on Show Source  to see how it is done:

<pre>
                 H
                 *
               * *
       19 ft *   *
           *     * 16 ft
         *       *
       ***********
</pre>
The SINE of angle at H will be {{{16/19}}}, and no doubt you can do the rest.