right angle

(redirected from 90 degrees)
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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 ?
Lower the chest to the floor, maintaining a neutral spine until arms reach a 90 degree bend at the elbow.
Warm weather can arrive early - it was 90 degrees on May 7 in 1987.
3 Run the boards at 90 degrees to the main joists, fixing the decking boards with two screws to each joist.
Lie on your side with both knees bent at 90 degrees, squeeze a rolled towel under the upper arm (elbow flexed to 90 degrees) and, using a two or three-pound dumbbell, lift for 30 repetitions.
The combination of universal and fixed-angle operation is facilitated by a design innovation that allows the head to rotate up to 90 degrees either side of the centerline.
Three different microclimates were simulated in incubators at 50, 70, and 90 degrees Fahrenheit.
Rollers on the TRT belt's top surface are positioned at 90 degrees to the belt's direction of travel -- an arrangement that provides smooth, 90-degree transfer-on and 90-degree transfer-off package handling.
Rear Arm Raise - from the prone starting position, raise the arms posteriorly to approximately 90 degrees to the midline of the body.
The flanged edge of a typical panel stands up at about 90 degrees from the panel surface prior to hemming.
Think of this as a conceptual rotation through 90 degrees, a right-angle turn as opposed to a 180-degree reversal.
That's because these fixtures can trap enough heat inside the fixture to destroy the insulation on wires that aren't rated for 90 degrees C.
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.