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### 44 Cards in this Set

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 altitude of a triangle Segment that is perpendicular from a vertex to the lince containing the opposite side angle bisector of a triangle Segment that bisects an angle of a triangle and has one endpoint on the opposite side CPCTC "Corresponding parts of congruent triangles are congruent" congruent triangles Triangles whose corresponding angles and corresponding sides are congruent distance from a point to a line Length of the perpendicular from the point to the line. median of a triangle segment that extends from a vertex to the midpoint of the opposite side hypotenuse Side of a right triangle that is opposite right angle legs of a right triangle Sides opposite the acute angles right triangle triangle with one right angle acute angle angle whose measure is between 0 and 90 acute triangle triangle with three acute angles adjacent angles two coplanar angles that have a common vertex,a common side, and no common interior points alternate exterior angles pair of nonadjacent angles, both exterior, on opposite sides of the transversal alternate interior angles pair of nonadjacent angles, both interior, on opposite sides of the transversal angle union of two noncollinear rays with a common endpoint auxiliary line lines, segments, rays, or points added to a figure in order to facilitate a proof or an understanding of a problem between points Given three collinear points X, Y, and Z, Y is between X and Z if and only if XY+YZ=XZ between rays Given three cooplanar rays OA, OT, and OB, OT is between OA and OB if and only if: m of AOT+m of TOB=m of AOB biconditional "If and only if" statement formed by combining a conditional and its converse into one statement angle bisector ray that seperates an angle into two angles of egual measures segment bisector any line, segment, ray, or plane that intersects a segment at its midpoint collinear points that lie on the same line complementary angles two angles whose measures sum to 90 conclusion "Then" part of a conditional statement conditional statement formed by joining two statements, p and q, with the words if and then congruent angles angles that have egual measures congruent segments segments having equal measures contrapositive statement related to a conditional statemtn in the form: If ~q, then ~p converse statement related to a to a conditional statement in the form:If q, then p convex polygon polygon in which the lines containing the sides do not contain points in the polygon's interior coordinate number paired with each point on a number line coplanar points that lie on the same plane corollary theorem whose justification follows from another theorem corresponding angles pair of nonadjacent angles--one interior, one exterior--both on the same side of the transversal decagon a 10-sided polygon deductive reasoning reasoning logically from given statements to a desired conclusion diagonal (of a polygon) segment that joins two nonconsecutive vertices distance absolute value of the difference of the cooridinates of two distinct points on a line edge (plane) line that separates a plane into two half-planes equiangular triangle triangle in which all angles are congruent equilateral triangle triangle in which all sides are congruent formal proof a logical argument in which each statement requires justification Given hypothesis of a proof half-planes two halves of a plane that are separated by a line