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Geometry
Prentice Hall
40
Mathematics
10th Grade
11/22/2010

Additional Mathematics Flashcards

 


 

Cards

Term
Inductive Reasoning
Definition
is based on patterns you observe
Term
Conjecture
Definition
a conclusion you reach using inductive reasoning
Term
Counterexample
Definition

an example for which a

conjecture is wrong

Term
point
Definition

a location represented by a small dot

named by a capital letter

Term
space
Definition
the set of all points possible
Term
collinear points
Definition
points that lie on the same line
Term
postulate or axiom
Definition

an accepted statement of fact

something that true

Term
Segment
Definition

part of a line

it has two endpoints and it

includes all of the points between

Term
ray
Definition
part of a line that has one endpoint and all of the points on that side of the endpoint
Term
opposite rays
Definition

two collinear rays

with the same endpoint

Term
parallel lines
Definition
two coplanar lines that do not intersect
Term
skew lines
Definition
noncoplanar lines that are not parallel and do not intersect
Term
parallel planes
Definition
planes that do not intesect
Term
coordinate points
Definition
points on a line or a graph that correspond with real number
Term
Congruent Segments
Definition
segments that are the same length
Term
midpoint
Definition
a point that divides the segment into two congruent (equal) segments
Term
angle
Definition

formed by two rays

with the same endpoint

Term
acute angle
Definition

angles that measure

between 00 and 900

Term
Right angle
Definition

an angle that measures exactly

900

Term
obtuse angles
Definition

angles that measure between

900 and 1800

Term
Straight Angle
Definition

an angle that measures exactly

1800 

Term
congruent angles
Definition
angles with the same measurements
Term
line
Definition
a series of points that extends in two opposite directions without end
Term
Reflexive Angle
Definition

 

an angle that measures 3600

Term
Complimentary Angles
Definition
Angles that add up to 900
Term
Supplementary Angles
Definition
angles that add up to 1800
Term
Adjacent Angles
Definition
Angles that share one common vertex
Term
Perpendicular Bisector
Definition

a line, a ray or line segment that bisects a line segment and is also perpendicular

[image]

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Term
Projection to a given point
Definition

on a given line it is the foot of the perpendicular drawn from the given point to the given line.

[image]

Term
projection of a segment
Definition

when the segment is not perpendicular: it is a segment with ednpoints that are the projections of the endpoints of the given line segment onto a given line.

 

Term
polygon
Definition
a figure with the same number of sides as angles
Term
equilateral polygon
Definition
a polygon all of whose sides are equal in measure
Term
apothem
Definition
the segment from the center of the polygon perpendicular to a side of the polygon
Term
radius of a polygon
Definition
the same measure as the side of a regular polygon
Term
scalene triangle
Definition
a triangle with no equal sides
Term
Obtuse Triangle
Definition

a triangle with one angle

greater than 900

Term
acute triangle
Definition

a triangle with three angles

less than 900

Term
altitude of a triangle
Definition

a line segment perpendicular from the opposite side to the vertex

sometimes it is drawn on the outside of the figure.

Term
area of a triangle
Definition
a = .5bh
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