Chapter 1 flash cards

Question 1

Polygon

Answer 1

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

Question 2

Isometric

Answer 2

Shows a corner view of a 3-D figure

Question 3

Orthographic

Answer 3

Shows 3 seperate views: top, front, right

Question 4

Conjecture

Answer 4

Guess or prediction; reached by using inductive reasoning

Question 5

Point

Answer 5

A location with no sides

Question 6

Line

Answer 6

Contains at least 2 points and extends 2 opposite directions infinitely

Question 7

Plane

Answer 7

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

Question 8

Line Segment

Answer 8

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

Question 9

Ray

Answer 9

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

Question 10

Opposite Rays

Answer 10

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

Question 11

Collinear Points

Answer 11

Points that lie on the same line

Question 12

Coplaner

Answer 12

Points and lines that lie on the same plane

Question 13

Space

Answer 13

Set of all points in 3-D

Question 14

Postulate 1-1

Answer 14

Through any two points there is exactly one line

Question 15

Postulate 1-2

Answer 15

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

Question 16

Postulate 1-3

Answer 16

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

Question 17

Postulate 1-4

Answer 17

Through any three noncollinear points there is exactly one plane

Question 18

Segment

Answer 18

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

Question 19

Postulate 1-5: Ruler Postulate

Answer 19

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

Question 20

Distance

Answer 20

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

Question 21

Postulate 1-6: Segment Addition Postulate

Answer 21

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

Question 22

Congruent Segments

Answer 22

Segments that have the same length

Question 23

Segment Bisector

Answer 23

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

Question 24

Angle

Answer 24

An angle is formed by two rays with the same endpoints

Question 25

Acute angle

Answer 25

Less that 90

Question 26

Right angle

Answer 26

X = 90

Question 27

Obtuse Angle

Answer 27

90 < x < 180

Question 28

Straight angle

Answer 28

X= 180

Question 29

Postulate 1-8: Angle Addition Postulate

Answer 29

If point B is the interior of <AOC

Question 30

Conclusion

Answer 30

The last step in a reasoning process

Question 31

Adjacent Angles

Answer 31

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

Question 32

Vertical Angles

Answer 32

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

Question 33

Complementary Angles

Answer 33

Two angles whose measures have a sum of 90

Question 34

Supplementary Angles

Answer 34

Two angles whose measures have a sum of 180

Question 35

Postulate 1-9: Linear Pair Postulate

Answer 35

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

Question 36

Linear Pair

Answer 36

2 adjacent angles that form a line

Question 37

Perpendicular

Answer 37

Right angles to a given line or plane

Question 38

Perpendicular Bisector

Answer 38

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

Question 39

Midpoint

Answer 39

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

Question 40

Consecutive

Answer 40

Following in order without interruption