Chapter 2&3 Flashcards

0
Q

Postulate about planes

A

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

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1
Q

Postulates about lines

A

Two points determine a line
A line contains two points
If two lines intersect the intersection is a point

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2
Q

Perpendicular

A

Two lines that meet at a right angle

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3
Q

Addition property of equality

A

a+c=b+c

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4
Q

Subtraction property of equality

A

a-c=b-c

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5
Q

Multiplication property of equality

A

A(c)=b(c)

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6
Q

Division property of equality

A

A/c=b/c

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7
Q

Substitution property of equality

A

A can be substituted for B In any equation or expression

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8
Q

Distributive property

A

a(b+c)=AB+BC

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9
Q

Reflexive property of equality

A

A=A a thing equals to itself

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10
Q

Symmetric properties of equality

A

A=b, then b=a

If one expression equals another, it doesn’t matter which expression foes on which side

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11
Q

Transitive properties of equality

A

If a=b and b=c, then a=c

If two things equal a third thing, they also equal each other

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12
Q

Right angle congruence theorem

A

All right angles are congruent

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13
Q

Vertical angles congruence theorem

A

All vertical angles are congruent

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14
Q

Linear pair postulate

A

Angles in a linear pair are supplements

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15
Q

Parallel lines

A

Don’t intersect and slopes are equal
They can be on a plane
A line can be parallel to a plane if it is on the plane or on another plane that’s parallel

16
Q

Skew lines

A

Do not intersect and are not on the same plane

17
Q

Parallel postulate

A

Given a line and a point not on the line, you can draw only one line that is parallel to the original line and goes through the point.

18
Q

Perpendicular postulate

A

Given a line and a point not on the line, you can draw only one line that is perpendicular to the original line and goes through the point.

19
Q

Transversal

A

A line that intersects two or more other limes at different points

20
Q

Interior angles

A

Inside the lines

21
Q

Exterior angles

A

Outside the lines

22
Q

Consecutive angles

A

Same side of the transversal

23
Q

Alternate angles

A

Opposite sides of transversal

24
Q

Consecutive interior angles postulate

A

parallel lines crossed by a transversal, consecutive interior angles will always be supplementary

25
Q

Alternate Interior Angles Postulate

A

parallel lines crossed by a transversal, alternate interior angles are always congruent

26
Q

Alternate Exterior Angles Postulate

A

parallel lines crossed by a transversal, alternate exterior angles are congruent.

27
Q

Corresponding Angles Postulate

A

Parallel lines crossed by a transversal, corresponding angles are congruent

28
Q

Consecutive Interior Angles Converse Theorem

A

If their consecutive interior angles are supplements then the lines are parallel.

29
Q

Alternate interior angles converse theorem

A

if their alternate interior angles are congruent, then the lines will be parallel.

30
Q

Alternate exterior angles converse theorem

A

if their alternate exterior angles are congruent, then the lines will be parallel.

31
Q

Corresponding angles converse theorem

A

if their corresponding angles are congruent, then the lines will be parallel

32
Q

Transitive property of parallel lines

A

If A is parallel to B and B is parallel to C then A and C are parallel.

33
Q

Slopes of parallel lines

A

If two lines are parallel, then they have the same slope
If two lines have the same slope, then they are parallel
Vertical lines have no slope, but they are always parallel to each other

34
Q

Slopes of perpendicular lines

A

If two lines are perpendicular to each other, their slopes are opposite and reciprocal to each other
If two lines have the slope that is opposite and reciprocal of each other, they are opposite of each other.
Vertical lines are always perpendicular to a horizontal line.

35
Q

Perpendicular Transversal Theorem

A

if a transversal us perpendicular to one of two parallel lines, then it is perpendicular to the other.

36
Q

Lines Perpendicular to a Transversal Theorem

A

in a plane, if two lines are perpendicular to the same line, then they are parallel to each other.