acute angle
noun
an acute angle is less than 90 degrees
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noun
two angles that are formed when one angle is divided into two parts by a straight line
noun
maths
the shape that is made where two straight lines join or cross each other. Angles are measured in degrees. An angle that measures 90 degrees is a right angle; if it is less than 90 degrees, it is an acute angle, and if it is more than 90 degrees, it is an obtuse angle.
noun
the angle of the imaginary line between the position of a plane, ship etc and the position of another object
noun
the two inside corner angles formed where a straight line crosses two parallel lines
noun
the angles opposite each other that are formed when two lines intersect (=cross each other)

a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computerrelated skills
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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'
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