Honors Geometry - Ch 1 Flashcards

1
Q

Postulate 1

A

through any two points there is exactly one line

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2
Q

Postulate 2

A

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

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3
Q

Postulate 3

A

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

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4
Q

Postulate 4

A

through any three noncollinear points, there is exactly one plane

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5
Q

Postulate 5

A

A line contains at least two points; a plane contains at least three points not all in one line; space
contains at least four points not all in one plane.

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6
Q

Postulate 6

A

Through any two points there is exactly one line.

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7
Q

Postulate 7

A

Through any three points there is at least one plane, and through any three noncollinear points
there is exactly one plane.

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8
Q

Line

A

made up of points and has no thickness or width

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9
Q

Point

A

a location

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10
Q

Plane

A

a flat surface made up of points that extend infinitely

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11
Q

Intersection

A

geometric figures that is a set point in common

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12
Q

Space

A

boundless 3D set of all points

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13
Q

Locus

A

set of points that satisfy a particular condition

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14
Q

Line segment

A

segment of a line has two end points

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15
Q

Betweenness of points

A

the points between the endpoints

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16
Q

Congruent Segments

A

segments that have the same measure

17
Q

Constructions

A

creating shapes with a ruler and a protractor

18
Q

Absolute error

A

= to one half the unit of measure

19
Q

Accuracy

A

how close the measure comes to the desired value

20
Q

Significant Digits

A

The bigger numbers on a ruler

21
Q

Irrational Number

A

number that can’t be expressed as a termination or repeating decimal

22
Q

midpoint

A

halfway between the end points

23
Q

Segment Bisector

A

line or plane that intersects a segment at its midpoint

24
Q

Angle

A

“L” formed by two noncolinear rays

25
Q

Vertex

A

where the rays of an angle meet

26
Q

Interior Angle

A

open mouth of the angle

27
Q

Exterior Angle

A

closed mouth of the angle

28
Q

Degree

A

a location around a circle

29
Q

Right Angle

A

90 degrees

30
Q

Acute Angle

A

Smaller than 90 degrees

31
Q

Obtuse Angle

A

Bigger than 90 degrees

32
Q

Angle Bisector

A

a ray that divides an angle into two congruent angles

33
Q

Adjacent Angles

A

angles with a common vertex that lie in the same plane

34
Q

Linear Pair

A

adjacent angles with noncom sides that are opposite rays

35
Q

Vertical Angles

A

nonadjacent angles formed by intersecting lines

36
Q

Complementary Angles

A

angles with a sum of 90

37
Q

Supplementary Angles

A

angles with a sum of 180

38
Q

Perpendicular

A

lines or rays that form right angles

39
Q

Polygon

A

Closed figure with coplanar segments