Answer:
[tex]apothem =\frac{s}{2tan(\frac{180}{n})} \\apothem =\frac{17}{2tan(\frac{180}{3})} \\apothem =\frac{17}{2tan(60)} \\apothem =\frac{17}{2\sqrt{3}} \\apothem =\frac{17}{2\sqrt{3}} \\apothem =\frac{17\sqrt{3}}{6}\\apothem =\frac{29.44}{6}\\apothem =4.9ft[/tex]
