A trapezium prism has 8 vertices. Each of these is made up of one solid angle. So, in terms of solid angles the answer is 8.
However, each vertex is also a point where 3 planes meet and, between them, these form three 2-dimensional angles. So there are 24 2-dimensional angles in all.
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A trapezium prism has 10 vertices
A Trapezium have 2 equal angles.
A trapezium has four vertices.
A trapezium has 4 interior angles that add up to 360 degrees
4