Shared Flashcard Set

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Chapter 1 test
28
Mathematics
10/18/2012

Term
 Point [image]
Definition
 A point specifies only location; it has no length, width, or depth. We usually represent a point with a dot on paper, but the dot we make has some dimension, while a true point has dimension 0.
Term
 Line [image]
Definition
 A line has only one dimension: length. It continues forever in two directions (so it has infinite length), but it has no width at all. A line connects two points via the shortest path, and then continues on in both directions
Term
 Line Segment [image]
Definition
 A line segment is the portion of a line lying strictly between two points. It has a finite length and no width.
Term
 Ray  [image]
Definition
 A ray can be thought of as a half a line. It has a point on one end, and it extends infinitely in the other direction.
Term
 Plane [image]
Definition
 A plane is a flat, two-dimensional object. We often represent a plane by a piece of paper, a blackboard, or the top of a desk. In fact, none of these is actually a plane, because a plane must continue infinitely in all directions and have no thickness at all. A plane can be defined by two intersecting lines or by three non-collinear points.
Term
 Opposite Rays [image]
Definition
 two rays with a common endpoint that form a line
Term
 Collinear [image]
Definition
 in the same line
Term
 Coplanar [image]
Definition
 within the same plane
Term
 Angle [image]
Definition
 the union of 2 rays that have the same endpoint; measured in degrees or radians (trig.); the five types of angles are zero, acute, right, obtuse, and straight
Term
 Midpoint [image]
Definition
 the point M of [image] where AM = AB
Term
 Bisector [image]
Definition
 a ray that is in the interior of an angle and forms two equal angles with the sides of that angle
Term
 Congruent [image]
Definition
 two figures where one is the image of the other under a reflection or composite of reflections
Term
 Vertex [image]
Definition
 a description of a point in a network where it is possible for two different segments to share the same endpoints
Term
 Acute angle [image]
Definition
 an angle whose measure is greater than 0 but less than 90 degrees
Term
 obtuse angle [image]
Definition
 an angle whose measure is greater than 90 but less than 180 degrees
Term
 Right angle [image]
Definition
 an angle whose measure is 90 degrees
Term
 straight angle [image]
Definition
 an angle whose measure is 180 degrees, forming a line with its sides
Term
 Complementary angles [image]
Definition
 2 angles whose measures, when added together, equal 90 degrees
Term
 Supplementary angles [image]
Definition
 angles that add up to 180 degrees
Term
 Vertical angles [image]
Definition
 2 angles that share a common vertex and whose sides form 2 lines
Term
Definition
 2 nonstraight and nonzero angles that have a common side in the interior of the angle formed by the noncommon sides
Term
 Linear pair [image]
Definition
 2 supplementary adjacent angles whose noncommon sides form a line
Term
 Perpendicular lines [image]
Definition
 2 segments, rays, or lines that form a 90 degree angle
Term
 Polygon [image]
Definition
 a union of 3 or more segments where each segment intersects 2 other segments, one at each endpoint; "many sided"
Term
 Concave   [image]
Definition
 A shape or solid that has an indentation if there is atleast one line segment connecting interior points which passes outside the figure
Term
 Convex [image]
Definition
 a geometric fugure with no identions. also if every line segmentconnecting interior points is entirely contained with the figures interior
Term
 Diagonal   [image]
Definition
 A line segment connecting connecting non-adjacent vertices of a polygon
Term
 Perimeter [image]
Definition
 the distance around the outside of a plane figure
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