Question

an object has 6 faces and 4 faces are rectangular, can you be sure it is a rectangular prism

Answer 1

The first image above is that of a rectangular prism and it is also a shape with 6 rectangular faces.

The second image above is that of a trapezium prism.

A 3-dimensional object with only 4 rectangular faces will look like the 2nd image above, and the 2nd image is not a rectangular prism