Chapter 1 flash cards

1
Q

Polygon

A

Two-dimensional figure with three or more sides; closed figure no sides cross each other with straight edges

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2
Q

Isometric

A

Shows a corner view of a 3-D figure

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3
Q

Orthographic

A

Shows 3 seperate views: top, front, right

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4
Q

Conjecture

A

Guess or prediction; reached by using inductive reasoning

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5
Q

Point

A

A location with no sides

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6
Q

Line

A

Contains at least 2 points and extends 2 opposite directions infinitely

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7
Q

Plane

A

A flat surface extending in all directions infinitely; contains at least 3 non collinear points

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8
Q

Line Segment

A

Part of a line containing 2 end points and all points in between

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9
Q

Ray

A

Part of a line that has 1 end point and extends in 1 direction

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10
Q

Opposite Rays

A

2 rays that share the same end point and form a line

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11
Q

Collinear Points

A

Points that lie on the same line

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12
Q

Coplaner

A

Points and lines that lie on the same plane

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13
Q

Space

A

Set of all points in 3-D

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14
Q

Postulate 1-1

A

Through any two points there is exactly one line

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15
Q

Postulate 1-2

A

If two distinct lines intersect, then they intersect in exactly one point

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16
Q

Postulate 1-3

A

If two distinct planes intersect, then they intersect in exactly one line

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17
Q

Postulate 1-4

A

Through any three noncollinear points there is exactly one plane

18
Q

Segment

A

Part of a line that consists of 2 end points and all points between them

19
Q

Postulate 1-5: Ruler Postulate

A

Every point on a line can be paired with a real number, called the coordinate of the point

20
Q

Distance

A

Between 2 points is the absolute value of the difference of their coordinates

21
Q

Postulate 1-6: Segment Addition Postulate

A

If three points A,B, and C are collinear and B is between A and C, then AB+ BC= AC

22
Q

Congruent Segments

A

Segments that have the same length

23
Q

Segment Bisector

A

A point, line, ray, or another segment that intersects a segment at its midpoint

24
Q

Angle

A

An angle is formed by two rays with the same endpoints

25
Q

Acute angle

A

Less that 90

26
Q

Right angle

27
Q

Obtuse Angle

A

90 < x < 180

28
Q

Straight angle

29
Q

Postulate 1-8: Angle Addition Postulate

A

If point B is the interior of <AOC

30
Q

Conclusion

A

The last step in a reasoning process

31
Q

Adjacent Angles

A

Two coplanar angles with a common side, a common vertex, and no common interior points

32
Q

Vertical Angles

A

Two angles whose sides are opposite rays; created by 2 intersecting lines; they are congruent; they are congruent

33
Q

Complementary Angles

A

Two angles whose measures have a sum of 90

34
Q

Supplementary Angles

A

Two angles whose measures have a sum of 180

35
Q

Postulate 1-9: Linear Pair Postulate

A

If two angles from a linear pair, then they are supplementary

36
Q

Linear Pair

A

2 adjacent angles that form a line

37
Q

Perpendicular

A

Right angles to a given line or plane

38
Q

Perpendicular Bisector

A

A segment is a line, segment, or Ray that is perpendicular to the segment at its midpoint

39
Q

Midpoint

A

A midpoint of a segment is a points that divides the segment into two congruent segments

40
Q

Consecutive

A

Following in order without interruption