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Space Race
Defend Earth from alien invaders
Point
Has no size, no width, named by a capital letter
Represented by a dot, all geometric figures consist of points

Line
extends forever has no thinkness

Plane
extends in all directions without ending, has no edges, drawn as a four-sided Figure

Space
is the set of all points

Collinear points
points are points all in one line

Coplaner
Points all in one plane

Midpoint of a segement
a point that divides the segment into 2 congrunt segments

Adjacent
2 angles in plane with common vertex and common side, no more then 1 common interior point

Linear Pair Postulate
Angles that add up to 180

Segment Addition Postulate
If B is between A and C, then AB+BC=AC
Segments that have equal kenghts

Postulate
(logic) a proposition that is accepted as true in order to provide a basis for logical reasoning(accepted without proof)

Theorems
statements that can be proven/ are proved

Substitution Property
If a = b, then either a or b may be substituted for the other in any equation

Division Property
if a=b and c≠0, then a/c=b/c

Multiplication Property
if a=b, then ac=bc

Angle Bisector Theorem
If a point is on the bisector of an angle, then it is equidistant from the two sides of the angle, If ray BX is the bisector of angle ABC, then angle ABX = 1/2angleABC and angle XBC = 1/2 angle ABC

Angle addition property
two or more adjacent angles can be added together to create a single larger angle, If ray BC is in the interior of < ABD, the <1 + <2 = < ABD

reflective property
a = a, when the same number is equal exacly. 8=8, AB=AB

Transitive Property
If a=b and b=c, then a=c(Dominoes) , If one quantity equals a second quantity, and the second quantity equals a third quantity, then the first quantity equals the third quantity

Symmetric property
If a=b, then b=a, If one quantity equals a second quantity, then the second quantity equals the first

Distributive Property
a(b+c)=ab+ac

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