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The concept of distances along great circles and straight lines is explored using maps. Airline flight paths are used as an example.









Great Circles and Straight Lines: Annotated Teacher Edition (Microsoft Word 4.6MB Nov27 12)
Great Circles and Straight Lines: Student Handout (Microsoft Word 2.6MB Nov27 12)
Great Circles and Straight Lines: Student Answer Sheet (Microsoft Word 614kB Nov27 12)