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Decimal Degree and Degree-Minute-Second Form. There are two basic forms for expressing degrees: Decimal Degrees (DD) Degree-Minute-Second (DMS). An essential skill in Trigonometry is to be able to convert from DD to DMS and from DMS to DD. Basic Conversions. 1 degree = 60 minutes.
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Decimal Degree andDegree-Minute-Second Form • There are two basic forms for expressing degrees: • Decimal Degrees (DD) • Degree-Minute-Second (DMS) • An essential skill in Trigonometry is to be able to convert from DD to DMS and from DMS to DD.
Basic Conversions 1 degree = 60 minutes 1 minute = 60 seconds 1 degree = 3600 seconds
Convert DD to DMS • Example 1: • Convert 0.5° to Minutes 0.5 Degrees 1 degree = 60 minutes 30 minutes
Example 2: • Convert 38.427° to Degree-Minute-Second form 38.427 degrees 1 degree = 60 minutes 38 degrees, 25.62 minutes
1 minute = 60 seconds 38 degrees, 25 minutes, 37.2 seconds
Convert DMS to DD • Example 3: • Convert 30' to Degrees 30 Minutes 1 minute= 1/60 of 1 degree 0.5 degrees
Example 4: • Convert 28°32'45“ to Decimal Degree form 28 degrees, 32 minutes, 45 seconds 1 minute = 1/60 degree 1 second = 1/3600 degree 28.546 degrees (thousandth)