chaoter 1 only
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| point | A dot in a specific location with no dimension
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| line | A straight path with no thickness that continues in both directions
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| plane | a flat surface with no thickness and extends forever
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| line segment | portion of a line consisting of 2 points
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| ray | a portion of a line that starts at a point and continues forever in 1 direction
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| parallel | Lines that lie on the same plane but do not intersect
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| coplaner | Points that lie on the same plane
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| collinear | Points that lie on the same line
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| postulate | a statement that is accepted as true without proof
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| segment addition postulate | if B is between A and C then AB+BC = AC
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| distance formula | (x2-x1)2+(y2-y1)2
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| midpoint | The point that divides the line segment into two segments that have the same length
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| segment bisector | A line, ray, or other figure that passes through the midpoint of a segment
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| angle | figure formed by 2 rays with the same endpoint
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| vertex | common end point
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| rays of angle | side of the angle
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| degrees | common measurement for circular arcs
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| right angle | 0<m<A<90
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| acute angle | m<A=90
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| obtuse angle | 90 <m<A<180
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| straight angle | m<A = 180
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| angle bisector | a ray that divided an angle into two angles that both have the same measure
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| angle addition postulate | if S is interior of <PQR then m<PQR=m<PQS + m< SQR
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| transformation | a function that changes the position shape and/or size of a figure
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| preimage | A figure that is used as the input of a transformation
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| image | The output
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| rigid motion | a transformation that changes the position of a figure witnout changing the size or shape of the figure
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| conjecture | a statement that is believed to be true
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| Inductive reasoning | The process of reasoning a rule or statement may be true by looking at specific cases
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| deductive reasoning | the process of using logic to prove whether all cases are true
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| theorem | A statement that you can prove is true using a series of logical steps
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| counterexample | an example that shows a conjecture to be false
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| conditional statement | a statement that can be written in the form "if p then q" where p is hypothesis and q is the conclusion
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| linear pair | A pair of adjacent angles whose non common sides are opposite rays.
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| addition property | if a=b then a + c = b + c
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| subtraction property | if a = b then a - c = b - c
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| multi property | if a = b then ac = bc
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| division property | if a = b and c = 0 then a/c = b/c
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| Reflexive property | a = a
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| Symmetric property | If a = b then b = a
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| transitive property | if a = b and b = c then a = c
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| substitution property | if a = b then b can be substituted for a in any expression
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| The linear Pair Theorem | if two angles form a linear pair then they are supplementary
m<3 + m<4 = 180
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