Which of the following tools is ideal for precise angle measurements?

The transit level is designed specifically for achieving precise angle measurements and is commonly used in construction and surveying. This tool utilizes a telescope to view and measure angles accurately both vertically and horizontally. Its capability to provide precise readings makes it essential for tasks that require careful alignment and layout, such as establishing grades and determining horizontal distances over long spans. The transit level's accuracy is vital for ensuring that structures are built correctly according to specified angles, which is critical in plumbing installations.

In contrast, while a general purpose level and builder's level can help ensure that surfaces are level, they are not as well-suited for precise angle measurements. A measuring tape is primarily designed for distance measurement rather than angle calculation. Hence, the transit level stands out as the ideal tool for the task of measuring angles.