To determine how many triangular bases there are among the 3 square pyramids and 2 pentagonal pyramids, we start by identifying the base shapes of each type of pyramid.
- Square Pyramid: A square pyramid has a square base.
- Pentagonal Pyramid: A pentagonal pyramid has a pentagonal base.
Since both the square and pentagonal pyramids do not have triangular bases, the total number of triangular bases in this scenario is:
- Square pyramids: 0 triangular bases
- Pentagonal pyramids: 0 triangular bases
Adding these together gives: 0 + 0 = 0 triangular bases.
Therefore, the answer is 0 triangular bases.