**TI83F* AppVariable file 03/22/07, 09:52ë: Ú:GLPA10Ú:Ř:nav AEC13267AEFC43F88E67E1C0E88B5B83GLPA10.GLPA101  adjacent anglesŤ-!ˆadjacent angles:ÖAngles that have the same vertex, share a common side, and do not overlap. In the figure, 1 and 2 are adjacent angles alternate exterior anglesÂ%!‰alternate exterior angles:ÖIn the figure, transversal t intersects lines l and m. 1 and 7, and 2 and 8 are alternate exterior angles. alternate interior anglesÂ%!‰alternate interior angles:ÖIn the figure, transversal t intersects lines l and m. 3 and 5, and 4 and 6 are alternate interior angles. altitude“!~altitude:ÖA line segment perpendicular to the base of a figure with endpoints on the base and on the vertex opposite the base. center of a circle6!Šcenter of a circle:ÖThe given point from which all points on a circle are the same distance. In the figure, P is the center of the circle. center of rotation Jcenter of rotation:ÖThe fixed point about which a figure rotates or spins. circle6!icircle:ÖThe set of all points in a plane that are the same distance from a given point called the center.  circumference,circumference:ÖThe distance around a circle.  complementary anglesŤ-!Šcomplementary angles:ÖTwo angles are complementary if the sum of their measures is 90. In the figure,Ö1 and 2 are complementary angles.   congruent#congruent:ÖHaving the same measure.  corresponding anglesÂ%!Çcorresponding angles:ÖAngles that have the same position on two different parallel lines cut by a transversal. In the figure, 1 and 5, Ö2 and 6, 3 and 7, and 4 and 8 are corresponding angles.  corresponding partsFcorresponding parts:ÖParts of congruent or similar figures that match.  diagonal78!kdiagonal:ÖA segment joining two nonconsecutive vertices of a polygon. In the figure, seg. SQ is a diagonal. diameter#!ldiameter:ÖThe distance across a circle through its center. In the figure, seg. TG is a diameter of circle K. dilationDdilation:ÖA transformation in which a figure is enlarged or reduced. exterior anglesÂ%!nexterior angles:ÖIn the figure, tranversal t intersects lines l and m. 1, 2, 7, and 8 are exterior angles. image7image:ÖThe position of a figure after a transformation. interior anglesÂ%!ointerior angles:ÖIn the figure,Ötransversal t intersects lines l and m. 3, 4, 5, and 6 are interior angles. line of symmetry”5!bline of symmetry:ÖA line that divides a figure into two halves that are reflections of each other. parallel linesŮ!Uparallel lines:ÖLines in the same plane that never intersect and have the same slope.  parallelogramN0!Xparallelogram:ÖA quadrilateral with both pairs of opposite sides parallel and congruent. perpendicular lines| !aperpendicular lines:ÖLines which meet to form right angles and whose slopes have a product of -1. piśpi:ÖThe ratio of the circumference of a circle to its diameter. The Greek letter Ä represents this number. The value of pi is 3.1415926... . Approximations for pi are 3.14 and 22/7 . polygonQpolygon:ÖA simple closed figure in a plane formed by three or more line segments.  quadrilateral+quadrilateral:ÖA polygon having four sides. radiusM!Lradius:ÖThe distance from the center of a circle to any point on the circle.  reflectionń2!Rreflection:ÖA transformation in which a figure is flipped over a line of symmetry. regular polygon+!Qregular polygon:ÖA polygon that has all sides congruent and all angles congruent. supplementary anglesŞ!Xsupplementary angles:ÖTwo angles are supplementary if the sum of their measures is 180. transformation_transformation:ÖA mapping or movement of a geometric figure that changes its shape or position.  translationđ!Itranslation:ÖA transformation in which a figure is slid in any direction.   transversalÂ%!Ytransversal:ÖA line that intersects two or more other lines to form eight or more angles.! vertical anglese(!Švertical angles:ÖOpposite angles formed by the intersection of two lines. 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