Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…
Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…
Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…
Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…