Cathetus

In a right triangle, the cathetus (originally from the Greek word Κάθετος; plural: catheti), commonly known as a leg, is either of the sides that are adjacent to the right angle. It is occasionally called by the periphrasis `side about the right angle`. The side opposite the right angle is the hypotenuse. When referring to the hypotenuse,.....
Found on http://en.wikipedia.org/wiki/Cathetus

Cathetus

• (n.) One line or radius falling perpendicularly on another; as, the catheti of a right-angled triangle, that is, the two sides that include the right angle.
Found on http://thinkexist.com/dictionary/meaning/cathetus/

Cathetus

Cath'e·tus noun ; plural catheti . [ Latin , from Greek ... a perpendicular line, from ... let down, from .... See Catheter .] (Geom.) One line or radius falling perpendicularly on another; as, the catheti of a right-angled triangle, that is, the two sides tha...
Found on http://www.encyclo.co.uk/webster/C/37

cathetus

A line that is perpendicular to another line. Usually, it refers to one of the lines in a right triangle that is not the hypotenuse.
Found on http://www.daviddarling.info/encyclopedia/C/cathetus.html
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