Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to use a protractor [title] Approximate the measure of your angle. [step] Angles can be classified in three ways: acute, obtuse, and right. Acute angles are narrow (less than 90 degrees), obtuse angles are wide (greater than 90 degrees), and right angles are exactly 90 degrees (two lines perpendicular to each other).

Ending1: [substeps] Acute angles can range between 33 or more degrees (smaller than 37 degrees) or greater. To use a protractor, you need to determine whether your angle will be right or left based on the angle of your car and your surface. Ending2: If the angle you plan to use is greater than 90 degrees, multiply that number by 120. [substeps] Angles may range from 120 to 1045 degree depending on the shape of your object. Ending3: You can easily identify by eye, the category of angle you are trying to measure. Doing this step first helps you identify which scale to use on the protractor. Ending4: The only difference is the exact direction the angle of measurement is about. [substeps] Acute angles are slanted slightly to the right or left, with the most elevation in between.

Answer format: ending1/ending2/ending3/ending4