Question

Helpp

Which statements are true about a decagonal (10-sided) pyramid? Check all that apply.

It has one face that is a decagon.
It has two faces that are decagons.
It has 11 faces.
It has 20 edges.
It has 20 vertices.

Answer 1

1 , 3 and 4
there is one decagon on the bottom of the pyramid (not two)
1 face on the bottom and 10 faces (one for each side of the bottom) makes 11 faces
10 edges on the bottom decagon and 10 edges coming up to the top vertices that makes 20
and there are only 11 vertices (10 for the decagon on the bottom and one at the top)