Find the volume of the given prism

[chwala]

I have labeled the diagram here.

View attachment 296049
You are talking about abcd.

It could be a rectangle - though it sure doesn't look like one. It could also be a rhombus, though that is unlikely too. A rhombus has four equal-length sides. We would need to know that ab is the same length as bc, and we have no reason to assume that.

All we really know is that it's a parallelogram (because we constructed it to have parallel sides).

But it's actually irrelevant which one it is; they all use the same formula: bxh.You cannot assume this. Though, again, its actual sub-shape doesn't come into play in this case.

Thanks Dave, noted ...cheers