Texas Instruments TINSPIRECX manual Dynamic Changes, Tidying Up and Using Attributes

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First Steps with TI-Nspire™

Tutorial 5: Geometry

Now move to the top of the screen and enter some text, perhaps giving the user some explanation or instructions. You will need to press:

•b16 to select the Text option,

•Then click to start a box where text can be entered.

•Note you cannot do carriage returns in text boxes so do put in two lines you must use two text boxes!

Dynamic Changes

 

If you haven’t yet done so, try grabbing point A and sliding it

 

 

along its line. Make quite certain that you grab the point––

 

you must see its label. You may need to press e until the

 

point itself, rather than the triangle or label is selected. If you

 

do select the wrong item it is well worth remembering that

 

/d will undo any action if something happens that you

 

didn’t intend!

 

Notice that as you move the point, two sides of the triangle

 

and the label A all move too. What does not change however,

 

is the area.

 

Ready to grab A and slide it

 

Now try grabbing and dragging point B or C, and then the

 

line segment BC and the line parallel to it. In each case notice

 

which other items on the screen move, and which do not.

 

Thinking about how each item was originally defined should

 

explain whether it moves in relation to other items.

 

Tidying Up and Using Attributes

 

Finally it’s well worth seeing how to improve the appearance

 

 

of the screen and preventing items from being grabbed

 

unintentionally.

 

For this activity the scale in the top right corner may not be

 

needed. You can hide it with option 8 in the View menu.

 

The point that defines the parallel line may be rather

 

distracting, so you could hide it using option 3 in the

 

Actions menu.

 

Now from the Actions menu choose option 4: Attributes.

 

Changing the attributes of the triangle

Move the cursor to one of the sides of the triangle and

 

click (x) to select it.

 

This allows you to change the thickness and style of the line.

 

Press · to confirm your choices.

 

To change the shading of the shape, you need to ‘right-click’

 

on the triangle by placing the cursor over one of the edges

 

and pressing /b.

 

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© 2012 Texas Instruments Education Technology

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Contents First Steps About this document Contents Appendix TI-Nspire CX Keypad Layout Memory TI-Nspire DocumentsNothing on the screen? Battery Life Charging the handheldHome Screen First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Documents, Problems and Pages ScratchpadNavigating Documents First Steps with TI-Nspire Tutorial 1 TI-Nspire documents Contextual Menus Check list of some key points in Tutorial Calculator Application Basic operationsHistory Lesson Approximate CalculationsTemplates Menu of maths templatesGetting Set Document settings dialog boxEffect of changed settings Use of function notation Some AlgebraWays to define variables Lists of random integers Calculator MenuStatistical Distribution Tables Variables Linked to Documents List of defined variablesVarious text formatting Instructions Recording results Why use Notes?Making Notes Ways to split the screen You must press /e and then b Splitting the ScreenFormat sub-menu Interactive Notes An inserted comment Use of proof template and symbolsMore Options from the Notes Menu Use of Q+A templateAsking Questions Check list of some key points in Tutorial Graphing Functions GraphingGraphs & Geometry Two Views Graphing ViewOpen-hand cursor Grab and Drag PracticeChanging the Axes Grabbed tick mark on the axesChanging f2 in the function history Zoom settings Grabbed-sheet iconEditing, Deleting or Hiding a Function Trace picks out significant points Tracing GraphsPoints and coordinates Points of intersectionAnalyse Graph Menu Coordinates and labelled pointsAlternative icons Transformed graph and equation Using SlidersManually Moving Graphs Sequence Plotting Check list of some key points in Tutorial Two Parallel Lines GeometryView for Plane Geometry Drawing the base of the triangleMany options in the Construction menu What’s grabbable?Construct the Triangle Measurement menu Making MeasurementsVariables and Text Storing the measurement as a variableReady to grab a and slide it Tidying Up and Using AttributesDynamic Changes Changing the attributes of the triangleArea is now locked Unlocked/Unpinned Points B and C. Try Moving point BCheck list of some key points in Tutorial Lists & Spreadsheet Entering Data as ListsOne way to enter a formula Typical Spreadsheet Actions Using FormulaeConflict resolution Hand-made function table Capturing DataFunction Tables Simple function table Options for function tables Graph and table side by sideFrequency Charts Shoe Sizes and Hand Spans Charts with One VariableOne and Two Variable Statistics Comparing Boxplots Charts for Categorical DataPie Chart displaying categorical data Upper quartile displayedReady to add a 2nd variable Charts with Two VariablesFitting a Line by Hand and Eye Calculated regression line Statistics Calculations menu Drawing the Regression LineGetting the Stats Sets of statistics Dragging on the ChartsWorking with Frequency Data Effect of moving a point from here … … to hereTexas Instruments Education Technology Check list of some key points in Tutorial Measured circle Multiple RepresentationsDraw and Measure a Circle Two Scatterplots Setting up a scatter plot Data capture is under waySpreadsheet for Data Capture Collecting Just a Little DataLinear relationship Go to Town with Data CollectionFit a Straight Line Moving a straight line by hand Not a linear relationshipBasic quadratic ready for fitting… … and dragged into place Different Approach to ScatterplotsRegression
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