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Section 1.2 and 1.3 Definitions Dense- Numbers go on forever and there are an infinite number of numbers between two numbers. Section 1.8 Postulates Uniqueness property- There is an exact distance between two points. Additive property- If B is between line AC then AB+BC=AC. Definitions Betweeness- The number between two other numbers if it is greater than one of them and less than the other Section 2.1 Definition Convex figure- A figure with no holes or dents in the side of the figure IFF- If and only if Conditionals => Flip the hypothesis and conclusion example: p=>q Bi-conditionals If and only if the conditional and converse are true Union- The values between two numbers Intersections- What values are common between two numbers Section 3.1 and 3.3 Definition Angle Bisector- A ray that goes between angles Complementary angles- Two angles that equal 180 degrees Supplementary angles- Two angles that equal 90 degrees Adjacent angles- Two rays that end with a common end point. Linear pair- Two adjacent angles that are on non-common sides and opposite rays Vertical angles- Non-straight angles when the union of their sides are two lines. Theorem Linear pair theorem- Two angles that form a linear pair, they are supplementary Vertical angles theorem- Two angles that are vertical, then they are equal Postulates Angle addition postulate- <ABD+<DBC=<ABC Section 3.4 Postulates Reflexive property- a=a Symmetric property- If a=b, then b=a Transitive property- If a=b and b=c then a=c Substitution property- If a=b and b=c then a can equal c Multiplication property- Multiply or divide both sides an equation by the same number Section 3.5 Definitions Justifications- 3 types, Postulates, property and definition Section 3.6 Theorems C.A.P- Two lines are parallel if corresponding angles created by a transversal are equal. Definition Transversal- A line that intersects two other lines 3.7 Theorems Parallel and slope theorem- Slopes of parallel lines are equal Perpendicular and slope theorem- Slopes of perpendicular lines are opposite reciprocals Section 3.8 Theorem Two perpendicular theorem- Two coplanar lines are each perpendicular to the same line, they are parallel. Perpendicular to parallel theorem- If a line is perpendicular to one of two parallel lines, then it is also perpendicular to the other. 4.1 Definition Transformation- Two sets of points that each point in pre-image set 4.2 Postulate Reflection Postulate- Reflection preserve: Angle measure, betweeness co-linearity, distance 4.4 Definition Composite- The first transformations of a figure, then an additional transformation Magnitude- The distance between two points 4.6 Definition Vector – Magnitude and direction of a translation 4.7 Definition Isometric- Reflection or compostite of a reflection 5.5 Figure reflection theorem- The reflection image is corresponding if the angle has reflected points 5.6 Auxiliary Figures- Objects we add to a diagram to prove a statement Uniqueness- One and exactly one point or definition 5.7 Triangle Sum Theorem- The sum of the angles measure of three angles is 180 degrees. Any other polygon- 180(n-2) N=number of sides