Final answer:
Measure the angle between chair legs and the floor, a protractor (option B) is the appropriate tool. A ruler and a tape measure are used for length measurements, not angles.
Step-by-step explanation:
To measure the angle between the chair legs and the floor, the correct tool to use is a protractor. A protractor is specifically designed to measure angles in degrees. Other tools mentioned, such as a compass, ruler, and tape measure, are primarily used for measuring lengths and distances. For instance, a ruler can measure in inches, millimeters, or centimeters.
A tape measure is more suitable for longer distances and flexible measurements and can contain units such as feet, yards, or meters. However, when it comes to angles, the ruler, tape measure, and compass are not the appropriate choices.