6 sides are needed
The answer depends on their relative dimensions.
2 squares and 4 rectangles * * * * * 6 rectagles in three pairs. The ends need not be squares.
2
You need 4 rectangles and two squares * * * * * No, you do not need to have squares: there can be six rectangles - as in a brick shape.
A larger rectangular prism.
A rectangular prism has 6 flat surfaces
A rectangular prism.
6 rectangles. Three pairs of two each. A box is a rectangular prism.
6
To calculate the number of straws needed to make a rectangular prism, you would need to determine the dimensions of the prism (length, width, and height) in terms of the length of a single straw. Then, you would calculate the total number of straws required by multiplying the number of straws needed for each dimension. For example, if the prism is 10 straws long, 5 straws wide, and 3 straws high, you would need 10 x 5 x 3 = 150 straws.
Two are needed at each end of the prism
Using 6 squares, you can create a cube, which is a three-dimensional object with six faces, each being a square. Additionally, you can form a rectangular prism if you allow for different dimensions, but it will still have six rectangular faces. Other configurations, such as a tetrahedron or octahedron, cannot be made strictly from 6 squares, as they require triangular faces.