SOLUTION: How many heptagons is it possible to construct by joining the vertices of a decagon? Is there a formula for this? It seems like there is a systematic way to figure this out, but I'

Algebra ->  Polygons -> SOLUTION: How many heptagons is it possible to construct by joining the vertices of a decagon? Is there a formula for this? It seems like there is a systematic way to figure this out, but I'      Log On


   

Question 305922: How many heptagons is it possible to construct by joining the vertices of a decagon? Is there a formula for this? It seems like there is a systematic way to figure this out, but I'm stuck. Thanks.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
how many ways can a group of seven be selected from ten things, order does NOT count

10C7 = 120