Horizontal angles are measured using a ___.

Horizontal angles are measured using a ___.

• A. Builder's level
• B. Transit
• C. Theodolite
• D. Compasses

Answer: (A)

Measuring a horizontal angle means determining how far you must turn from one sight line to another on the same horizontal plane. A builder’s level is the tool that keeps your line of sight truly level while you rotate the instrument about a vertical axis to sight two points along that plane. By aligning the level to a baseline and then sweeping to a second point, you read the angle off the instrument and capture the horizontal angle between the two sight lines. On job sites, this simple setup is handy for basic layout tasks where you’re tying in lines to a horizontal reference. The other instruments have different primary purposes: a transit or theodolite are used for precise surveying and give direct readings of horizontal and vertical angles with higher accuracy, while a compass provides direction relative to magnetic north but isn’t used for measuring a specific angle between two sight lines in a layout.

Measuring a horizontal angle means determining how far you must turn from one sight line to another on the same horizontal plane. A builder’s level is the tool that keeps your line of sight truly level while you rotate the instrument about a vertical axis to sight two points along that plane. By aligning the level to a baseline and then sweeping to a second point, you read the angle off the instrument and capture the horizontal angle between the two sight lines. On job sites, this simple setup is handy for basic layout tasks where you’re tying in lines to a horizontal reference.

The other instruments have different primary purposes: a transit or theodolite are used for precise surveying and give direct readings of horizontal and vertical angles with higher accuracy, while a compass provides direction relative to magnetic north but isn’t used for measuring a specific angle between two sight lines in a layout.