Chapter 1 Flashcards
A connected straight path. It has no thickness and goes forever in both directions.
Line
A specific location. It has no dimension and is represented by a dot.
POINT. ( written as: Point B)
A flat surface that has no thickness and extends forever.
Plane. (Written as: A script/cursive capital letter or 3 points on the plane that do NOT all lie on a line. Written as Plane M (cursive) or Plane JKL.
A portion of a line consisting of two points and all points between them.
Line segment (segment)
A portion of a line that starts at a point and continues forever in one direction.
Ray
A rule that is accepted without proof.
Postulate, axiom
A rule that can be proved.
Theorem
The real number that corresponds to a point.
Coordinate
The distance between two points A and B, written as AB, is the absolute value of the difference of the coordinates of A and B.
Distance
When three points are collinear, you can say that one point is between the other two.
Between
Line segments that have the same length.
Congruent segments
Postulate 1 Ruler Postulate
The points on a line can be matched one to one with REAL numbers. The real number that corresponds to a point is the COORDINATE of the point.
Postulate 2 Segment Addition Postulate
If B is between A and C, then AB + BC = AC.
If AB + BC = AC, then B is BETWEEN A and C.
Is a polygon convex?
Yes
What is a polygon?
It’s convex if no line that contains a side of the polygon contains a point in the interior of the polygon
