Question

the rectangular prisms shown in isometric below have flat pattern on each of their four long sides. choose the panel for the flat pattern so that when folded up, the correct object is obtained.

Explanation:

Step1: Analyze the first prism

For the first rectangular - prism, observe the position of the black semi - circle and the diagonal line. When folding, the relative positions of the patterns on the faces must match. The black semi - circle is on one face and the diagonal line is on an adjacent face.

Step2: Check option A for the first prism

In option A for the first prism, the black semi - circle and the diagonal line are in the correct relative positions as they would be when the flat pattern is folded into a rectangular prism.

Step3: Analyze the second prism

For the second rectangular prism, look at the position of the black shape (a combination of a rectangle and a diamond - like shape) and the dots. The dots are on one face and the black shape is on an adjacent face.

Step4: Check option B for the second prism

In option B for the second prism, the black shape and the dots are in the correct relative positions as they would be when the flat pattern is folded into a rectangular prism.

Answer:

1. A
2. B