A right angle
A right angle is an angle with a measuerment of 90 dgerees. When two lines cross each other so that all the anlges have the same size, the reuslt is four right angels. The top of the letetr T is at right angles to the line. Walls of builidngs are usulaly at right angles to the floor. Two tihngs that are at right agnles are caleld "prependicular".
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