1. 1 To Add, Subtract in DMS & Convert Between DMS and Decimal Degrees “Character cannot be developed in ease and quiet. Only through experience of trial and suffering can the soul be strengthened, ambition inspired, and success achieved.” -Helen Keller

2. 2 LESSON: I. When adding DMS, add degrees together, minutes together, and seconds together. For example: But, what about: ???

3. 3 Try this:

4. 4 II. Let’s try subtraction: Try this: What about:

5. 5 III. To convert from DMS to decimal degrees (go to three decimal places-thousandths)

6. 6 Convert from DMS to decimal degrees

7. 7 IV. To convert from decimal degrees to DMS We want to go from degrees to minutes: We get: We want to go from minutes to seconds:

8. 8 To convert from decimal degrees to DMS

9. 9 Try to convert from decimal degrees to DMS

10. 10 Independent Practice: DMS Conversions & Add, Subtract DMS