BAZIC Semicircular 6" Protractor (Case of 288)

you can use a protractor to measure angles this full-circle protractor is 360 degrees a standard protractor is half a circle there are two sets of numbers the read counts one direction and the blue counts the other so it is a hundred eighty degrees there are ninety degrees in a square corner and 45 degrees in half a square corner let's take a look at this angle we can use a protractor to measure this angle first put the vertex on the center we're trying to find out how many degrees fall between the two arms of the angle which we do by finding the difference we can find the correct measurement of the angle as long as we use the numbers of the same color one arm of the angle points at the zero on the right which is blue so we can look at the blue numbers starting at zero the other arm of the angle points at the blue of 40 to find how many degrees are between the arms let's find the differ