## Elementary Geometry for College Students (6th Edition)

r=16 s=16$\sqrt 3$
The apothem of an equilateral triangles forms the short leg of a 30 60 90 triangle with a radius for a hypotenuse, and half of a side for a long leg. r=2a r=2(8) r=16 s=2(a$\sqrt 3$) s=16$\sqrt 3$)