Page 69 - Math Course 1 (Book 2)
P. 69
Introduction to Geometry
Let’s Begin
Model Points, Lines, and Planes
Name Lines and Planes
Examples
Examples
A. Name the geometric shape modeled by a 10 x 12
Use the f gure to name a line containing point K. patio.
The line can be named as
Answer
line a.
There are three points on the line. Any two of the
points can be used to name the line.
Answer The patio models a plane.
Use the f gure to name a plane containing point L.
B. Name the geometric shape modeled by a water
glass on a table
The plane can be named as
Answer
plane B.
You can also use the letters of any three non-collin-
ear points to name the plane.
plane JKM plane KLM plane JLM
The letters of each of these names can be reordered
to create other acceptable names for this plane. The glass on the table
For example, JKM can also be written as JMK, Answer models a point on a plane.
MKJ, KJM, KMJ, and MJK. There are 15 different
three-letter names for this plane.
Your Turn!
Proportional Relationships
A. Use the f gure to name a line containing the point X.
A. line X
B. line c
C. line Z
D. YZ
Answer
61
