An instrument to measure angles
protractor
An angle of less than 90°
acute angle
An angle of 90°
right angle
An angle of more than 90° and less than 180°
obtuse angle
An angle of more than 180 and less than 360°
reflex angle
An angle of 180°
straight angle
An angle that is between 181 and 359
Reflex angle
A point where two or more lines meet
vertex
the size of a complete angle
360°
A quarter turn angle is a (n)...
right angle
