how do you read a protractor?
is it left outer > inner
right inner > outer?
To read a protractor, you need to identify the center point of the angle you're measuring, align one side of the angle with the 0-degree mark on the protractor, and then read the number that corresponds to the other side of the angle.
If the angle you're measuring is to the left of the center point, you would read the measurement on the outer scale of the protractor. If the angle is to the right of the center point, you would read the measurement on the inner scale. The same principle applies when measuring angles greater than 90 degrees - use the outer scale for angles on the left side, and the inner scale for angles on the right side.