right angle

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right angle

the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90? or π/2 radians

right angle

[′rīt ′aŋ·gəl]
(mathematics)
An angle of 90°.

right angle

An angle of 90°.
References in periodicals archive ?
When the temperature reaches over 90 degrees, it is not safe for people to work up a sweat outside," said Chris Ruta, Vice President of Fitness at New York Sports Clubs.
Warm weather can arrive early - it was 90 degrees on May 7 in 1987.
Run the two outside edge boards at 90 degrees to the main decking
Assume a position sideways on a bench with the arm bent at 90 degrees and the lower arm as close as possible to the mid-line of the body.
There follows a knight's move through 90 degrees to clear a tubular turnstile and through another 90 degrees again to align yourself with a long, shadowy corridor from which you can hear the trickle of several faucets.
The air bag cover must perform predictably over a temperature range of -40 degrees C to 90 degrees C.
For customers who want increased durability, Planar's PT1520MU features a sturdy deskstand which allows the monitor to be tilted from 0 degrees to 90 degrees.
It provides seven editing options: rotate video 90 degrees CCW; rotate video 180 degrees; rotate video 90 degrees CW; flip video vertically; flip video horizontally; flip video vertically and rotate 90 degrees CCW; flip video vertically and rotate 90 degrees CW.
There are two types of USB cable on offer here--the "swinging USB cable," which swings through 90 degrees in either direction.
Benefits: This exercise is important for maintaining and developing a good posture Muscles Used:Rhomboids, rear deltoid Techn que: Lie on your front with your arms by your head, (upper arm at 90 degrees with your body and lower arm at 90 degrees with your upper arm).
Wall Sits (Photo 5): The athlete assumes a straight-back position against a wall with the legs bent at 90 degrees, with sandbags placed on the top of the thighs for resistance.
Within the sensor, a constant speed rotating mirror scans laser light over approximately a 90 degrees window.