Procedure:

1. Draw a ray OA on a sheet of paper.
2. Place the protractor on ray OA such that its center coincides with 0° (vertex) and ray OA passes through the zero mark on the protractor.
3. Mark a point B against the mark of 53° in the direction increasing from zero (three small divisions after the mark 50°) on the paper.
4. Remove the protractor and draw the ray OB.

Then the measure of ÐAOB is 53°.

1. An angle whose measure is 79 degrees.
2. An angle whose measure is 57 degrees.
3. An angle whose measure is 39 degrees.
4. An angle whose measure is 150 degrees.