right angle
Definition of right angle
: the angle bounded by two lines perpendicular to each other : an angle of 90° or ^{1}⁄_{2} π radians
Examples of right angle in a sentence
A square has four right angles.
Hold the nail at a right angle to the board.
The two boards are joined at right angles to each other.
15th Century
First Known Use of right angle
15th century
RIGHT ANGLE Defined for English Language Learners
right angle
Definition of right angle for English Language Learners

: an angle formed by two lines that are perpendicular to each other : an angle that measures 90°
RIGHT ANGLE Defined for Kids
right angle
Definition of right angle for Students
: an angle formed by two lines that are perpendicular to each other : an angle of 90 degrees
Learn More about right angle

Spanish Central: Translation of right angle Nglish: Translation of right angle for Spanish speakers Britannica English: Translation of right angle for Arabic speakers Britannica.com: Encyclopedia article about right angle
Seen and Heard
What made you want to look up right angle? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!