Intro to Geometry: Points, Lines, and Planes

1
Intro to Geometry Points, Lines, and Planes

• A point is a location in space. It has no size.
• A line is a series of points that extend in two
  directions without end. A line can be named with
  a lower case letter.
• A plane is a flat surface. It has no thickness.
  It continues without end in all directions
• A segment is a part of a line. It has two
  endpoints.
• A ray is a part of a line. It has exactly one
  endpoint. Name its end point first.

2
Introduction to Geometry Points, Lines, and
Planes
a. four points
b. four different segments
c. five other names for KI
d. five different rays
3
Introduction to Geometry Points, Lines, and
Planes
You are looking directly down into a wooden
crate. Name each of the following.
a. four segments that intersect PT
b. three segments parallel to PT
c. four segments skew to PT
Skew - not parallel and does not intersect.