**TI83F* AppVariable file 12/24/08, 18:32i iGLGE01iinav 9AE51D1EC13445C5B24A00CF0B737DCFGLGE01.+GLGE011   acute angle$!Gacute angle:An angle with a measure greater than 0 and less than 90. adjacent angles+W!adjacent angles:Angles that have the same vertex, share a common side, and do not overlap. In the figure, 1 and 2 are adjacent angles. angleMG!angle:A figure formed by two rays with a common endpoint. In the figure, RST is formed by rays SR and ST with the common endpoint(or vertex) S. angle bisectorZd!angle bisector:A ray whose endpoint is the vertex of the angle and is located in the interior of the angle. It separates a given angle into two angles with equal measure. In the figure, seg. PW is the angle bisector of P. area Zarea:The number of square units needed to cover a surface enclosed by a geometric figure. base7base:The two parallel congruent faces of a polyhedron. betweenbetween:For any two points A and B on a line, there is another point C between A and B if and only if A, B, and C are collinear and AC + CB = AB. betweenness of points,!sbetweenness of points:Point R is between points P and Q if and only if R, P, and Q are collinear and PR + RQ = PQ.   circumference,circumference:The distance around a circle.   collinearY!kcollinear:Three or more points that lie on the same line. In the figure, P, Q, and R are collinear points.  complementary angles+W!complementary angles:Two angles are complementary if the sum of their measures is 90. In the figure,1 and 2 are complementary angles.  concave4!concave:A polygon for which a point on at least one of its diagonals lies outside the polygon. In the figure, diagonal JL lies outside polygon JKLMN.  coneT!zcone:A three-dimensional figure with one circular base and one vertex. A curved surface connects the base and the vertex.  congruent#congruent:Having the same measure. congruent segments,congruent segments:Having the same measure.  constructionVconstruction:The process of drawing a figure using only a compass and a straightedge. convexL!Uconvex:A polygon for which all diagonals are located in the interior of the polygon. coplanar{7!coplanar:Points or lines that lie in the same plane. In the plane M, points A, B, and C are coplanar, and seg. AB and seg. BC are coplanar. cylinder_!6cylinder:A solid figure whose bases are formed by congruent circles in parallel planes and whose lateral surface is curved. The segment whose endpoints are the centers of the circular bases is called the axis of the cylinder. The altitude is a segment perpendicular to the bases with an endpoint in each base.  defined termJdefined term:explained using indefinite terms and/or other defined terms.  definitionHdefinition:explained using indefinite terms and/or other defined terms. degreedegree:The most common unit of measure for angles. If a circle were divided into 360 equal-sized parts, each part would have an angle measure of 1 degree, denoted as 1. distance8distance:The length of the segment between two points. edge>edge:The intersection of faces of a three-dimensional figure. equiangular polygon9equiangular polygon:A polygon with all congruent angles. equilateral polygon8equilateral polygon:A polygon with all congruent sides. exteriorq\!Rexterior:All points outside the sides of the angle. A is in the exterior of XYZ. face5face:The flat surface of a three-dimensional figure. interior@*!interior:A point is in the interior of an angle if it does not lie on the angle itself and it lies on a segment with endpoints that are on the sides of theangle.  intersectionFintersection:A set of points common to two or more geometric figures. line#line:A never-ending straight path.   line segment!Vline segment:Part of a line containing two endpoints and all the points between them.!  linear pair6O!Plinear pair:A pair of adjacent angles whose non-common sides are opposite rays." midpointMmidpoint:On a line segment, the point that is halfway between the endpoints.# n-gonn-gon:A polygon with n sides.$  obtuse angle:!Fobtuse angle:An angle that measures more than 90 but less than 180.%  opposite rays/!opposite rays:Two rays that are part of the same line and have only their endpoints in common. In the figure, ray XY and ray YZ are opposite rays.&  perimeter9perimeter:The distance around a closed geometric figure.'  perpendiculara![perpendicular:Lines which meet to form right angles and whose slopes have a product of -1.( planeD!Eplane:A two-dimensional flat surface that extends in all directions.) Platonic solidoPlatonic solid: The five regular polyhedra: tetrahedron, hexahedron, octahedron, dodecahedron, or icosahedron.* point:point:A specific location in space with no size or shape.+ polygonQpolygon:A simple closed figure in a plane formed by three or more line segments.,  polyhedronOpolyhedron:A solid with four or more flat surfaces that are polygonal regions.- prismf!prism:A polyhedron with two parallel, congruent faces called bases. A solid with the following characteristics:1. Two faces, called the bases, are formed by congruent polygons that lie in parallel planes.2. The faces that are not bases, called lateral faces, are formed by parallelograms.3. The intersection of two adjacent lateral faces are called lateral edges and are parallel segments.. pyramid'!pyramid:A solid figure that has a polygon for a base and triangles for sides. A pyramid is named for the shape of its base. A solid with the following characteristics:1. All the faces, except one, intersect at a common point called the vertex.2. The face that does not intersect at the vertex is called the base. The base is formed by a polygon.3. The faces meeting at the vertex are called lateral faces. They are formed by triangles./ rayTray:A part of a line that extends indefinitely in one direction from a fixed point.0 regular polygonW"!Qregular polygon:A polygon that has all sides congruent and all angles congruent.1 regular polyhedronI!Sregular polyhedron:A polyhedron in which the faces are regular congruent polygons.2  right angle52!0right angle:An angle that measures exactly 90.3 segment bisectorVsegment bisector:A segment, line, or plane that intersects a segment at its midpoint.4 sided?!Wside:The two rays that form an angle. In the figure, rays SR and ST are sides of RST.5 space7space:A boundless three-dimensional set of all points.6 sphereQ!csphere:The set of all points in space that are a given distance from a given point, called the center. It has the following characteristics:1. A radius is a segment whose endpoints are the center and a point on the sphere.2. A chord is a segment whose endpoints are points on the sphere.3. A diameter is a chord of the sphere that contains the center.7 supplementary angless$@$ 0 p@   0 0 @   #08`p`@ a@   @0 `<!0`@, @@@p@@@ 8 a   9` @ @ @8$8   @?p $3!(H1P`$R!&pR` RA!HR@>*|H*0P bJJ T8`?0     @p8TTTT8x<@<@x8p> x   8`