Presumably 3-4 refers to where the triangle and square meet and 4-5 is square to pentagon?
Yes. Specifically, the angle between the plane of the triangle/square and the plane of the square/pentagon. These should fall out anyway if you make it from a net (like this one) but it may be tricky to add tabs in all the right places.
Yes. Specifically, the angle between the plane of the triangle/square and the plane of the square/pentagon. These should fall out anyway if you make it from a net (like this one) but it may be tricky to add tabs in all the right places.