
"Understanding vocabulary is KEY to success on standardized tests," says Mrs. SS. "It is one of the main reasons students often fail or score poorly!"
Math terms are actually not difficult to learn and since they don't change yearafteryear, it is definitely best to get them under your belt. Let's take a look at the basic geometry terms. They're the same ones from elementary school.







point  a point names a location in space and has no size, it is represented by a dot








segment  a segment or line segment is part of a line and is designated by two endpoints and is composed of all the points between them








ray  a ray is part of a line; it begins at an endpoint and extends indefinitely in the other direction








line  a straight, onedimensional figure that has no thickness and goes on indefinitely in both directions








endpoint  a point at one end of a ray or at the beginning and ending of a segment








angle  a figure where two rays share a common endpoint (vertex)







plane  a flat, 2dimensional surface, has no thickness, and goes on forever and ever in all directions…
a plane can be defined by three points










polygons  2dimensional flat shapes made from straight line segments that don't cross over one another













circle  a set of points in a plane equidistant from a given point









area  the number of unit squares that can be fit into the space outlined by a closed curve




The name of a polygon depends upon the number of sides it has:










triangle: 3 sides
 sum of interior angles: 180º



octagon: 8 sides
 sum of interior angles: 1080º









quadrilateral: 4 sides
 sum of interior angles: 360º



nonagon: 9 sides
 sum of interior angles: 1260º





decagon: 10 sides
 sum of interior angles: 1440º



pentagon: 5 sides
 sum of interior angles: 540º





hexagon: 6 sides
 sum of interior angles: 720º



dodecagon: 12 sides
 sum of interior angles: 1800º





heptagon: 7 sides
 sum of interior angles: 900º



ngon: n sides
 sum of interior angles:







