Shape Identification

Okay, for the first half of this puzzle, can you correctly identify each of the following shapes?

I'll admit we've had harder puzzles. If you're stuck, here's a hint: circle, triangle, square.

Now for the second half of the puzzle. Is there a solid three-dimensional shape that looks like each of the above shapes from a different direction? Assume that you're viewing an orthographic projection. That is, the three shapes represent how the object looks from an infinite distance, without perspective.