# math midterm

 The flashcards below were created by user lmtrackstar on FreezingBlue Flashcards. segment addition postulate If point B falls between point A and C, and A, B, and C are collinear,then AB + BC = AC 2. Angle addition postulate all the angles in a triangle add up to 180 degrees 3. Definition of parallel two lines that don’t intersect and are coplanar Definition of perpendicular two lines that intersect toform a right angle are perpendicular what existst between any 2 points? a line through any 3 noncolinear points there exists what? a plane Addition Prop of Equality a = b, then a + c = b + c waht is RAT right angle congruency all right angles are congruent Congruent Supplements Theorem if two angles are supplementary to the same angle (or to congruentangles) then they are congruent Congruent Complements Theorem if two angles are complementary to the same angle (or to congruentangles) then they are congruent Linear Pair Postulate (LPP if two angles form a linearpair, then they are supplementary Parallel postulate if there is a line and a point not on that line, then there is exactlyone line through the point parallel to the given line Perpendicular Postulate if there is a line and apoint not on the line, then there is exactly one line through the pointperpendicular to the given line Corresponding angles postulate if two lines cut by a transversal are parallel, then the correspondingangles are congruent Transitive property of parallel lines if two coplanar lines are parallel to the same line, then they areparallel to each other Slopes of parallel lines postulate in a coordinate plane, two non-vertical lines are parallel if and onlyif they have the same slope Slopes of perpendicular lines postulate in a coordinate plane, twonon-vertical lines are perpendicular if and only if they have slopes that arenegative reciprocals If two lines intersect to form a linear pair of congruent angles, then the lines are perpendicular (theorem) If two lines intersect to form a linear pair of congruent angles, thenthe lines are perpendicular (theorem) what postulates prove congruency? sssaaasasasahl what is cpctc (corresponding parts of corresponding triangles are congruent) base angles theorem if two sides of a triangle are congruent, then the angles opposite thesesides are also congruent base angles theorem corollary if a triangle is equilateral, then it is equiangular converse of the base angles theorem if two angles in a triangleare congruent, then the two opposite sides are congruent corollary to the converse of the base angles theorem if a triangle is equiangular, then it is equilateral Corresponding lengths in similar polygons if two polygons aresimilar, then the ratio of any two lengths in the polygon is equal to the scalefactor. Perimeters of similar triangles if two polygons aresimilar, then the ratio of their perimeters is equal to the ratio of thelengths of their corresponding sides (scale factor) waht postulates prove similarity? aa- if two angles of one triangle are congruent to two angles of anothertriangle, then the triangles are similarssssas Triangle Proportionality Theorem if a line parallel to oneside of a triangle intersects the other two sides then it divides the two sidesproportionally converse of the Triangle Proportionality Theorem if a line intersects 2 sides of a triangle and it divides the sidesproportionally, then it is parallel to the other side Midsegment Theorem the midsegment of a triangle is half the length of the side it doesnot intersect and parallel to that side Authorlmtrackstar ID125697 Card Setmath midterm Descriptionpostulates theorems Updated2012-01-02T23:38:38Z Show Answers