Points, Lines, Planes, Midpoint, Distance
line
A collection of an infinite number of points in a straight pathway with unlimited length and having no width.
ray
A part of a line, with one endpoint, that continues without end in one direction
point
A precise location or place on a plane. It is usually represented by a dot.
plane
A surface with length and width but no thickness, extending infinitely in all directions.
segment addition postulate
If B is between A and C, then AB + BC = AC
perpendicular lines
Lines that intersect to form right angles
coordinate
Ordered pairs that identify points on a coordinate plane. (x,y)
vertex
The common endpoint of an angle
distance formula
The distance d between any two points with coordinates
midpoint formula
a point that divides a segment into two congruent segment
pythagorean theorem
a² + b² = c²
x axis
horizontal axis
parallel lines
lines in the same plane that never intersect
line segment
part of a line with two endpoints
collinear points
points that lie on the same line
coplanar points
points that lie on the same plane
y axis
vertical axis
