An infinite number.
There are 7 different shapes, but some handheld variations add more.
true
There are a total of three parallelograms in a triangular prism. Each of the sides are parallelograms, while the ends are triangles.
2
True
yes
20
2
Eight.
There are six of them.
No trapezoids are parallelograms, and no parallelograms are trapezoids.
No trapezoids are parallelograms, and no parallelograms are trapezoids.