College Algebra & Trigonometry, 2018a

346 CHAPTER 8. RIGHT TRIANGLE TRIGONOMETRY
This is the decimal portion of the angle
129 ◦ 19 ′ 30 ′′ =129 ◦ 19.5 ′ = 129.325 ◦
If you end up with repeating decimals in this process that’s fine - just indicate the
repeating portion with a bar.
Examples
Convert 42 ◦ 27 ′ 36 ′′ to decimal degrees
36
60 =0.6
42 ◦ 27 ′ 36 ′′ =42 ◦ 27.6 ′
27.6
60 =0.46
42 ◦ 27.6 ′ = 42.46 ◦
Convert 17 ◦ 40 ′ 18 ′′ to decimal degrees
18
60 =0.3
17 ◦ 40 ′ 18 ′′ =17 ◦ 40.3 ′
40.3
60 =0.6716
17 ◦ 40 ′ 18 ′′ =17 ◦ 40.3 ′ = 17.6716 ◦