Chapter 2&3 Flashcards
Postulate about planes
Three points determine a plane
Has at least three non collinear points
Two points in a plane, the likes with the points lie in the plane
If two points intersect the intersection is a line
Postulates about lines
Two points determine a line
A line contains two points
If two lines intersect the intersection is a point
Perpendicular
Two lines that meet at a right angle
Addition property of equality
a+c=b+c
Subtraction property of equality
a-c=b-c
Multiplication property of equality
A(c)=b(c)
Division property of equality
A/c=b/c
Substitution property of equality
A can be substituted for B In any equation or expression
Distributive property
a(b+c)=AB+BC
Reflexive property of equality
A=A a thing equals to itself
Symmetric properties of equality
A=b, then b=a
If one expression equals another, it doesn’t matter which expression foes on which side
Transitive properties of equality
If a=b and b=c, then a=c
If two things equal a third thing, they also equal each other
Right angle congruence theorem
All right angles are congruent
Vertical angles congruence theorem
All vertical angles are congruent
Linear pair postulate
Angles in a linear pair are supplements