Answer:

A square has 4 sides, a triangle has 3, a circle
has 1 and a hexagon has 6, so:

In total they have 14 sides.

Answer:

A square-based pyramid has 8 edges, 5 faces and 5 vertices.

A cylinder has 2 edges, 3 faces & no vertices.

Answer:

This shape is an octagonal prism:

It has 24 edges, 10 faces and 16 vertices. In
total, 75 of them would have 1,800 edges, 750
faces and 1,200 vertices.