context: Right angle If we divide the straight angle 180 into two equal parts, then each section is called a right angle, its size is 90 degrees and is equal to an acute angle is the angle which measures less than 90 degrees. An obtuse angle is an angle that is larger than 90 degrees and smaller than 180 degrees. A straight angle is an angle that has two straight sides and two different directions. 180 ° non-angle is the angle that measures 0 degrees. Two equal angles are equal angles. Two angles that share the head are two angles that share the head and the ribs. Two complementary angles are two angles with a total measurement of 90 degrees. Two complementary angles are two angles with a total measure of 180 degrees. Two adjacent angles are two angles that share the same side. The angles are exchanged in the head, which are two angles that are formed if there are two parallel lines that have a section (not perpendicular) so we say that all angles
question: What is the acute angle in engineering?
answers.text: which measures less than 90 degrees