BAZIC Semicircular 6" Protractor (Case of 288)

hello and welcome to my video on how to use a protractor protractor is used to measure the amount of angle degrees in an angle and it is made up of usually a hole or a notch which you place over the vertex of the angle is zero degree line which is at zero or going to the left at zero degrees you'll notice there's two sets of numbers you use the number that represents your angle so if I'm over here at 120 that will be if it's an obtuse angle and 60 across from the 120 will be if it's acute so knowing that let's try to measure an angle what I have here is an angle which I can measure from this side or I can measure from this side now if the lines are too short to reach all the way over to where you're measuring you can always extend the angles because rays go on forever just make sure that you're very much in line with the existing ray and extend it as far as you wish once you do that the