A restaurant uses a container that is shaped like a right triangular prism to package carry out sandwich orders. A net of the container is shown below.

The net of the container consists of three rectangular faces and two right triangle faces. The rectangular faces will form the top, bottom, and one side of the container while the right triangle faces will form the other two sides of the container.

To assemble the container, the right triangle faces are folded along the dotted lines and the rectangular faces are folded along the solid lines. The side with the tabs is the top of the container and is secured with glue or tape.

This type of container is efficient for packaging sandwich orders as it can accommodate different sizes of sandwiches and keep them secure during transport. Additionally, the triangular shape allows for easy stacking of multiple containers, saving space both in storage and during delivery.

Overall, this right triangular prism container is a practical and versatile option for packaging carry out sandwich orders in a restaurant setting.