GEOMETRY GLOSSARY
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Title  Description  

Lateral  The flat sides of a geometric solid are generally termed the Lateral sides or Lateral surface area. 

Lateral Surface Area  The Lateral Surface Area of a geometric solid is the expanse of the flat sides (or smooth sides). Be careful, some solids have faces that are termed bases and not lateral surfaces. 

Leg, Trapezoid  The Leg of a Trapezoid is one of the nonparallel sides. 

Leg, Triangle  Most generally the legs of a triangle refer to the perpendicular sides of a right triangle only. 

Lemma  A little, inconsequential theorem is sometimes called a Lemma. 

Line  A collection of points that comprise the shortest path between two points in Euclidean geometry is a Line; all points in a Line are collinear and, of course, coplanar. 

Line Segment  A section of a line, with endpoints on both ends, is a Line Segment. 

Linear  As the first four letters imply, Linear means "of a line" or "lined up" in a collinear fashion. 

Linear Pair  Two adjacent supplementary angles form a Linear Pair. 

Loci  The points that comprise a function (or graph thereof) are its Loci. 

Locus  A single point on a function or on its graph is a Locus. 

Logic  Logic takes many forms and is instrumental in understanding the language of mathematics. 
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