right angle
noun
: the angle bounded by two lines perpendicular to each other : an angle of 90° or ¹/₂ π radians
right-angled
ˈrīt-ˈaŋ-gəld 
adjective or right-angle
ˈrīt-ˈaŋ-gəl
Example Sentences
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.
Recent Examples on the Web Bump into a rock, a curb, or a hillside at just the right angle, and your car will catch a boost of speed and leap into the air before landing safely on the road ahead of you. 
Sam Machkovech, Ars Technica, 22 Aug. 2022 At each mark, drill into the back edge at a perfect right angle. Jeanne Huber, Washington Post, 27 June 2022 One man worked on getting just the right angle for a selfie with the screen livestreaming the marathon behind him. oregonlive, 17 July 2022 But it will be known regardless by whatever nickname catches the fancy of the fan base — something to know the right angle that now stands in left-center field of Oriole Park at Camden Yards. Andy Kostka, Baltimore Sun, 6 Apr. 2022 Make sure to research thoroughly, find the right angle, stick to the structure, write in a clear voice and add some honesty and urgency. Marcel Sattler, Forbes, 21 Apr. 2022 Number of names, and counting, suggested for the new right angle in left-center, including Adley’s Angle and Elrod’s Corner. Steve Earley, Baltimore Sun, 11 Apr. 2022 About 1,000 seats along 10 rows were removed from the stadium to make way for the deeper wall, and a right angle was added to left-center field where fans used to look down into the bullpens. Andy Kostka, Baltimore Sun, 11 Apr. 2022 But the office of Oslotre’s founding partner, Jørgen Tycho, displays an enormous chunk of wood: two precisely cut pieces of cross-laminated timber that were slotted together at a right angle, then secured with wooden dowels. Rebecca Mead, The New Yorker, 18 Apr. 2022 See More
Sam Machkovech, Ars Technica, 22 Aug. 2022 At each mark, drill into the back edge at a perfect right angle. Jeanne Huber, Washington Post, 27 June 2022 One man worked on getting just the right angle for a selfie with the screen livestreaming the marathon behind him. oregonlive, 17 July 2022 But it will be known regardless by whatever nickname catches the fancy of the fan base — something to know the right angle that now stands in left-center field of Oriole Park at Camden Yards. Andy Kostka, Baltimore Sun, 6 Apr. 2022 Make sure to research thoroughly, find the right angle, stick to the structure, write in a clear voice and add some honesty and urgency. Marcel Sattler, Forbes, 21 Apr. 2022 Number of names, and counting, suggested for the new right angle in left-center, including Adley’s Angle and Elrod’s Corner. Steve Earley, Baltimore Sun, 11 Apr. 2022 About 1,000 seats along 10 rows were removed from the stadium to make way for the deeper wall, and a right angle was added to left-center field where fans used to look down into the bullpens. Andy Kostka, Baltimore Sun, 11 Apr. 2022 But the office of Oslotre’s founding partner, Jørgen Tycho, displays an enormous chunk of wood: two precisely cut pieces of cross-laminated timber that were slotted together at a right angle, then secured with wooden dowels. Rebecca Mead, The New Yorker, 18 Apr. 2022 See More Word History
First Known Use
15th century, in the meaning defined above
Kids Definition
right angle
noun
: an angle formed by two lines that are perpendicular to each other : an angle of 90 degrees