These acute angles are the same. It does not matter how long the lines are because it is the amount of turn that is being measured. Image caption, An obtuse angle is between 90° and 180°.

The protractor in the image below has been used to measure an angle of 110°. An acute angle is less than 90°, a right angle is exactly 90°, and an obtuse angle is between 90° and 180°.