Grades 9 & 10 
Mathematics 
Geometry 
Standard 17

Students prove theorems using coordinate geometry,
including the midpoint of a line segment, distance
formula, and various forms of equations of
lines and circles.
 
 
Resources
Lesson Plans
Assessments

Geometry 
Larson/Boswell/Stiff, 1995,  
D.C. Heath and Company 

Section References 

1.4 Exploring Symmetry 

1.5 Coordinate Geometry 
and Noncoordinate 
Geometry 

Software 

Tangible Math:  
Mathematics Toolbox, 
LOGAL Software, Inc. 
1994 
floppy mac/windows 

Specific Textbook   
Web Sites   

http://www.glencoe.com/  
sec/math/prealg/mathnet/   

http://www.eduplace.com/  
links/   

http://www.eduplace.com/   

http://www.hmco.com/  
college/mathematics/  
index.html   

http://www.mcdougallittell  
.com/   

http://www.hmco.com/   

http://www.SRA-4KIDS.com/   

General Math   
Reference Sites   

http://www.learner.org/  
sami/view-category.php3  
?category=math   

http://www.score.k12.ca.us/   

http://henson.austin.apple  
.com/edres/curric.shtml   

http://school.discovery.com/  
schrockguide/index.html   

http://www.EDsOasis.org/   

http://www.math.com/   

http://www.nea.org/grants/  
free.html   

http://www.wcom.com/  
marcopolo/   

http://www.udel.edu/sine/   

http://dewey.chs.chico.k12  
.ca.us/math.html   

Free Stuff   

http://www.nea.org/  
grants/free.html   

State/National Math   
Ed Organizations   

http://www.nctm.org/   

http://www.cde.ca.gov/   

Calif. Dept. of Ed. Standards, Assessment, Ed. Reference.   

Calculator Reference Site   

http://www.ti.com/  
calc/docs/calchome.html 



Previously Published Data 

1.) Students will review the x, y coordinate system, graphing lines, slope and equations of lines. 


2.) Students will reproduce the proof of the distance of a line using the Pythagorean Theorem. 
3.) Students will do numerous examples on graph paper finding the midpoint of a line segment and generalizing about what they are doing in each case. 
4.) Students will use this generalization to prove the theorem of the midpoint of the line segment.
 

Previously Published Data 

1.) Students will solve problems involving the distance between, and midpoint of, two points. 


2.) Students will find the midpoint between two cities and the distance between two cities on a map. 
3.) Students will prove the distance formula and the midpoint theorem.