# Video lesson: Degrees-minutes-seconds on the TI-nspire

If you’re a student of geometry or trigonometry, you’ve probably come across problems involving degrees, minutes, and seconds.  This is an alternative to measuring in decimal degrees, and it works a lot like time.

The conversion rates are:
• 1 degree = 60 minutes
• 1 minute = 60 seconds.
As a result, 1 degree = 3,600 seconds.

If you want to convert from degrees, minutes, seconds to decimal degrees, you can divide by 60 and 3600 for minutes and seconds respectively.  In reverse, you would multiply.  The whole conversion process can get time consuming, especially in a testing situation, which is why it’s good to know how to use your graphing calculator.
This video lesson walks you through degrees-minutes-seconds on the TI-nspire.

### Lucas Allen

For more than a decade, Lucas Allen was a high school math teacher and math team coach in Illinois. His 2012 Morton High School math team won the Illinois state championship. Recently, he made the jump from public education to the corporate world and is now working as a data scientist. He is interested in just about all forms of technology, including the TI-Nspire, Nexus devices, R, MOOCs, and more. You can follow , and if you are nice, he will probably follow you back.