What shape should be cut when making a large opening in a wall to help maintain structural integrity?

When making a large opening in a wall while aiming to maintain structural integrity, a triangular shape is favored due to its inherent strength and stability. The triangle disperses weight evenly across its three sides, which helps to prevent any undue stress on the remaining structure. This geometric configuration is pivotal in construction and engineering because it minimizes the risk of collapse or structural failure.

In contrast, other shapes like squares or rectangles can create points of weakness, particularly along the edges, where stress concentrations may lead to structural weaknesses. A circular opening, while aesthetically pleasing and often used in certain applications, does not provide the same level of strength when it comes to bearing loads as a triangular shape does. Therefore, the triangular cut is the optimal choice for achieving both an effective opening and maintaining the overall integrity of the wall.