Shared Flashcard Set

Details

Geometry week 1
basic vocabulary
22
Mathematics
9th Grade
08/27/2011

Additional Mathematics Flashcards

 


 

Cards

Term
Point
Definition
- names a location in space and has no size . P
Term
Line
Definition
a straight path that has no thickness and extends forever with 2 letters with 1 letter in italics
Term
Plane
Definition
a flat surface that has no thickness and extends forever
determined by 3 points - plane ABC or marked with italic letter – plane P
Term

Collinear

Definition
points that lie on the same line
Term

Coplanar

Definition
points that lie on the same plane
Term

Skew

Definition
lines that are not coplanar
Term

Line Segment

Definition
part of a line consisting of 2 endpoints and all points between them
Term

Ray

Definition
a part of a line that starts at an endpoint and extends forever in one direction
determined by 2 points, the endpoint is listed first - AB
Term

Angle

Definition
a figure formed by 2 rays with a common endpoint
determined by 2 points, the endpoint is listed first, ے ABC or ے B (the vertex)
Term

Vertex

Definition
the common endpoint of the sides of an angle
Term

Adjacent angles

Definition
2 angles in the same plane with a common vertex and a common side
Term

Complementary

Definition
2 angles whose measures have a sum of 90°
Term

Supplementary

Definition
2 angles whose measures have a sum of 180°
Term

Linear pair

Definition
a pair of adjacent angles that form a line (opposite rays)
Term

Vertical angles

Definition
nonadjacent congruent angles formed by 2 intersecting lines
Term

Midpoint

Definition
the point that divides a segment into 2 congruent segments
Term

Bisect

Definition
to divide into 2 congruent parts
Term

Symmetry

Definition
a transformation of a figure that forms 2 congruent parts of the figure
Term

Similar

Definition
2 figures that have the same shape, but not necessarily the same size, denoted by ≈
Term

Congruence

Definition
having the same size and shape, denoted by =
Term

Parallel

Definition
2 lines in the same plane that do not intersect, denoted by ǁ
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