McGraw Hill
Glencoe Mathematics: Online Study Tools: Line and Angle Relationships
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of line and angle relationships.
Science Education Resource Center at Carleton College
Serc: Westward Ho! How Far Is Yonder Mountain
In this lesson quantitative skills in geologic context are reinforced. Young scholars create a spreadsheet to calculate the distance of a peak using vertical angles sighted from a wagon train heading directly for the peak. The...