In commerce, liquid oxygen is classified as an industrial gas and is widely used for industrial and medical purposes. Liquid oxygen is obtained from the oxygen found naturally in air by fractional distillation in a cryogenic air separation plant.
Lesson Summary. An acute angle is any angle smaller than 90 degrees. A right angle is an angle that measures 90 degrees. It doesn't matter how much smaller the angle is than 90 degrees; as long as it's smaller, it's acute. To unlock this lesson you must be a Study.com Member.
Try this Adjust the angle below by dragging an orange dot and see how the angle â ABC behaves. Acute angles are the smallest, being between (but not including) zero and 90Â° Note also that acute triangles are those where all the interior angles are acute. A way to remember Sometimes we can confuse acute and obtuse angles.