TI-Nspire For Dummies, 2nd Edition
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Calculations can be used to make sense of the measurements that were taken. The TI-Nspire Attach feature is a handy way to display the results of the calculations and measurements. You can use these tools to prove that two angles that form a linear pair are supplementary.

Follow these steps to perform a calculation:

  1. Place some text for your calculation. Move your cursor to an open space, right-click ([CTRL][MENU]), and choose Text. Type a+b and then press [ENTER].

  2. Right-click ([CTRL][MENU]) the text, choose Calculate, [CLICK] one of the angle measures, and then [CLICK] the other angle measure. Press [ENTER] to anchor the calculation.

    See the second screen.

  3. To lay down more text, right-click, [CTRL][MENU]→Text. Press


    (degree symbol). Press [ENTER] to anchor the text. Repeat two more times to give [+] and [=] a text box of their own.

  4. Work right to left and attach each piece of the equation to the piece before it. Right-click ([CTRL][MENU]) degree symbol, choose Attach, and [CLICK] the right side of the 180.

    Now, right-click 180 degrees and attach it to the = sign. Keep working backward until the equation is together in one attached piece! See the third screen.

The Graphs and the Geometry applications are approximate environments. As a result, you may occasionally get a calculation or result that is not what you expect. For example, if you move the point to form a 0˚ angle, TI-Nspire displays 1.21Å-6˚, instead of 0˚. This is scientific notation for the number 0.00000121, which is extremely close to zero. Consider these small noise values to be zero.


About This Article

This article is from the book:

About the book authors:

Jeff McCalla teaches Algebra 2 and Pre-Calculus at St. Mary's Episcopal School in Memphis. He is a T3 instructor for Texas Instruments and co- founder of the TI-Nspire SuperUser group. Steve Ouellette wrote the first edition of TI-Nspire For Dummies as well as CliffsNotes® Guide to TI-Nspire.

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