Oxford Advanced American Dictionary
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right angle
noun
right-angled triangle
noun
hard
adverb
right-angled
adjective
hypotenuse
noun
ballistic missile
noun
tangent
noun
cosine
noun
Pythagoras' theorem
noun
Definition of
right angle noun
from the Oxford Advanced Learner's Dictionary
right angle
noun
an angle of 90°
Place the table
at right angles/at a right angle
to the wall
compare
acute angle
,
obtuse angle
,
reflex angle