How do you use a protractor when you draw an angle of 75?

Draw a straight horizontal line, and a vertical line in the middle of it. Now line these up the the lower edge of your protractor, with the vertical line in the middle of your protractor (at the 90 degree marking). Now, find the 75 degree marking on the protractor, and mark on the piece of paper where it falls. Draw a line from centre of your horizontal line, to the mark of where 75 degree is. You're done!