### angle

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.

### angle

noun the shape that is made where two surfaces or objects meet

### azimuth

noun the angle of the imaginary line between the position of a plane, ship etc and the position of another object

### cant

noun the difference in height between one side of a road or railway and the other

### complement

noun maths an angle that is added to another angle to form an angle of 90 degrees

### complementary angles

noun two angles that together form a right angle

### crook

noun the place where something bends inwards

### obtuse angle

noun any angle that is between 90° and 180°

### opposite angles

noun the angles opposite each other that are formed when two lines intersect (=cross each other)

### reflex angle

noun an angle that is between 180° and 360°

### supplementary angles

noun two angles that make 180° when they are added together

### vertex

noun maths the point that is opposite the base of a triangle