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Flashcards in Chapter 1 Deck (77):
1

is made up pf points and lines, has no thickness or width. exactly one through two points

line

2

flat surface made of 3 or more points. extends infinitely in all directions. made of 3 non co-lin points

plane

3

a line with 2 distinct endpoints

line segment

4

part of a line that has one endpoint. extends infinitely in one direction.

ray

5

two collinear rays that form a line

opposite rays

6

Points that lie on the same line

Co-linear points

7

Points that do not lay on the same line

non co-linear points

8

Set of all the points two geometric figures have in common

Intersection

9

2 lines that never intersect

parallel lines

10

boundless, 3 dimensional set of all points. can contain lines and points

space

11

points that lie on the same plane

coplanar points

12

points that do not lie on the same plane

non co-planar points

13

all of the elements in a combined set

union

14

2 lines that intersect at exactly 1 point and form a right angle

perpendicular lines

15

Notate: point X

X

16

Notate: line G

cursive lowercase g

17

Notate: Line RG


RG

18

Notate: Collinear points M, N, O

co-lin M,N,O

19

Notate: non collinear points A,B,C

non co-lin A,B,C

20

Notate: Plane F

Uppercase, Cursive, F

21

notate: plane HTB

Plane HTB

22

Notate: Coplanar Points V,W,X

Co-pl V,W,X

23

Notate: Non co-planar C, D, E, F

non co-pl C, D, E, F

24

Notate: Segment PQ

------
PQ

25

if PM+ MQ= PQ, M is (between, preceding) points P and Q

between

26

segments that have the same measure. slashes on figures denote this

congruent segments

27

the point halfway between the endpoints of a segment

midpoint

28

any segment, line, or plane that intersects a segment at its midpoint

segment bisector

29

Midpoint Formula on a Number Line

(x1+x2)/2

30

Midpoint formula in a coordinate plane

((x1+x2)/2, (y1+y2)/2)

31

The length of the segment between two endpoints

Distance between two points

32

Distance Formula on a Number Line

|x2-x1|

33

Distance Formula

SQUARE ROOT OF...
(x2-x1)^2+ (y2-y1)^2

34

A location, neither shape nor size

point

35

Is formed by 2 noncollinear rays that have a common endpoint

Angle

36

Decribe how to name an angle.

Three letters, vertex is ALWAYS in the middle. Can be named by number if given or vertex only if it is the only angle formed by the vertex

37

Sides of an angle

2 rays that make up an angle

38

Vertex

Common endpoint of an angle

39

Acute Angle

angle with a measure less than 90*

40

Right angle

Angle with measure of 90*

41

Angle with measure over 90*, less than 180*

Obtuse Angle

42

Straight angle

Angle with a measure of 180*

43

Congruent Angles

Angles with the same measure

44

Angle bisector

A ray that divides an angle into two congruent angles

45

Complementary Angles

Angles with measures that add up to 90*

46

Supplementary Angles

Angles with measures that add up to 180*

47

Adjacent Angles

Two angles that lie in the same plane and share a common vertex and a common side, but have NO common interior points

48

Linear pair

Two adjacent angles with a sum of 180*

49

Vertical Angles

two nonadjacent angles formed by two intersecting lines

50

Vertical Angles are (always, sometimes, never) congruent

always

51

Perpendicular Lines, Congruent Angles, and Congruent Segments (can, cannot) be assumed

Cannot

52

Polygon

Closed Figure in a plane that is formed by 3 or more line segments. No two sides are collinear

53

Vertex of a Polygon

Where two sides of the polygon meet

54

Convex Polygon

No line that contains a line of the polygon also contains an interior point of the polygon

55

Concave Polygon

If a line that DOES contain a side of the polygon also contains an interior point.
CAVES in.

56

Equilateral Polygon

Occurs if all sides are congruent

57

Equiangular Polygon

Occurs if all angles are congruent

58

Regular Polygon

Polygon that is
-equilateral
-equiangular
-convex

59

Irregular Polygon

Not a regular polygon

60

Polygon with 3 sides

Triangle

61

Polygon with 4 sides

Quadrilateral

62

Polygon with 5 sides

Pentagon

63

Polygon wth 6 sides

Hexagon

64

Polygon with 7 sides

Heptagon

65

Polygon with 8 sides

Octagon

66

Polygon with 9 sides

nonagon

67

Polygon with 10 sides

Decagon

68

Polygon with 12 sides

Dodecagon

69

Polygon with n sides

n-gon

70

Area of a triangle

(1/2)bh

71

Perimeter of a triangle

b+c+d

72

Perimeter of a square

4s

73

Area of a square

s^2

74

Perimeter of a rectangle

2l+2w

75

Area of a rectangle

lw

76

Circumference of a circle

2πr

77

Area of a circle

πr^2