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TI-84 Graphing Calculator - Geometry

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Cabri Jr. versus GeoMaster on the TI-84 Plus Calculator

Because the TI-84 Plus comes equipped with two geometry applications, Cabri Jr. and GeoMaster, you can now do your geometric investigations on the calculator. Granted, the calculator screen is rather small [more…]

Quit GeoMaster on the TI-84 Plus Calculator

You can use either a clean way or a dirty way of quitting the GeoMaster application on the TI-84 Plus calculator. The clean way truly terminates GeoMaster, [more…]

Construct Points for Geometric Figures with the TI-84 Plus

You can tell the TI-84 Plus calculator where you want to construct a freestanding point in two ways: Use the arrow keys to identify the location of the point, or tell the calculator the coordinates of [more…]

How to Construct Perpendicular Bisectors with GeoMaster

In GeoMaster on the TI-84 Plus graphing calculator, a perpendicular bisector can be constructed to an already existing line, segment, ray, vector, or side of a polygon or triangle. To construct a perpendicular [more…]

How to Construct Angle Bisectors with GeoMaster

For GeoMaster on the TI-84 graphing calculator to recognize the existence of an angle, that angle must contain three defining points — the vertex and a point on each side of the angle. Also, GeoMaster [more…]

Construct Points of Intersection with GeoMaster on the TI-84 Plus

GeoMaster on the TI-84 Plus graphing calculator can construct the points of intersection of any pair of the following types of objects: lines, segments, rays, vectors, sides of polygons, circles, and arcs [more…]

How to Construct a Point on an Object with the TI-84 Plus

You can use the GeoMaster DRAW menu on the TI-84 Plus to construct a point so that it is part of an existing object.

Then use the arrow keys to move the cursor to the location on the object where you wish [more…]

How to Construct a Midpoint with the TI-84 Plus

With GeoMaster on the TI-84 Plus graphing calculator, you can construct the midpoint of an already constructed segment or the midpoint between two existing points. The segment can be the side of a triangle [more…]

How to Determine If Two Lines Are Parallel or Perpendicular

It is often the case that when you construct lines, two lines may look parallel or perpendicular, when in fact they aren’t. GeoMaster on the TI-84 Plus graphing calculator can determine whether lines are [more…]

How to Determine If Three Points Are Collinear on the TI-84 Plus

Three points are collinear if they are on the same line. GeoMaster on the TI-84 Plus graphing calculator can determine whether lines are parallel or perpendicular for you. It is sometimes difficult to [more…]

How to Measure an Angle with GeoMaster

For GeoMaster on the TI-84 graphing calculator to recognize the existence of an angle, that angle must contain three defining points: the vertex and a point on each side of the angle. Also, GeoMaster recognizes [more…]

How to Find the Equation of a Line on the TI-84 Plus

The Eqns/Coords tool in theGeoMaster MEAS menu on the TI-84 Plus calculator can be used to find the equation of a line, the equation of a circle, or the coordinates of an already constructed point. It [more…]

Recall and Delete GeoMaster Files on the TI-84 Plus

To recall a GeoMaster file previously saved in memory on the TI-84 Plus graphing calculator, select Open File from GeoMaster’s File menu by pressing [Y [more…]

How to Start and Quit Cabri Jr. on the TI-84 Plus

Because the TI-84 Plus graphing calculator comes equipped with two geometry applications, Cabri Jr. and GeoMaster, you can now do your geometric investigations on the calculator. Granted, the calculator [more…]

How to Open and Delete Files in Cabri Jr. on the TI-84 Plus

To open a Cabri Jr. file previously saved in memory on the TI-84 Plus graphing calculator, press [Y=][5] to select Open from the F1 menu. Repeatedly press [more…]

Construct Lines and Segments in Cabri Jr.

The Cabri Jr. geometry application for the TI-84 Plus calculator offers Create and Construction menus that contain a plethora of tools. With these tools you can do mundane things such as construct lines [more…]

Construct Polygons in Cabri Jr. on the TI-84 Plus

Unfortunately, the Cabri Jr. geometry application for the TI-84 Plus calculator has no tool for constructing polygons having more than four sides. However, you can still construct a polygon having as many [more…]

Construct Perpendicular and Angle Bisectors in Cabri Jr.

In Cabri Jr., a geometry application for the TI-84 Plus calculator, a perpendicular bisector can be constructed to an already existing line, segment, or side of a triangle/polygon. [more…]

Construct a Point on an Object in Cabri Jr.

You can use the Cabri Jr. geometry application on the TI-84 Plus to construct a point so that it becomes part of an existing object. To construct a point on an object, first press [more…]

How to Measure an Angle in Cabri Jr.

For Cabri Jr. on the TI-84 Plus to recognize the existence of an angle, that angle must contain three defining points — the vertex and a point on each side of the angle. Also, Cabri Jr. recognizes a point [more…]

Use the Coord. & Eq. Tool in Cabri Jr.

The Coord. & Eq. tool in the Appearance menu of Cabri Jr. on the TI-84 Plus is used to find the equation of an already constructed line or circle or to find the coordinates of a point appearing on the [more…]

Use a Program to Display a Graph on the TI-84 Plus

You can use a program for the TI-84 Plus graphing calculator to display a graph. When the Input command isn’t followed by a variable name, it graphs the functions that are turned on in the Y [more…]

How to Find the Area of the Intersection of Two Polygons

GeoMaster on the TI-84 graphing calculator can’t find the area of a polygon formed by the intersection of two other polygons because GeoMaster doesn’t know that it’s there. To get GeoMaster to find the [more…]

Perform Calculations in GeoMaster on the TI-84 Plus

GeoMaster on the TI-84 Plus calculator is capable of adding and subtracting like measures that GeoMaster found using the Distance/Length, Area, or Angle [more…]

Find the Slope and Construct a Vector with GeoMaster

GeoMaster in the TI-84 Plus graphing calculator offers several features from the MEAS menu, including the Slope tool and the Vector Sum tool. The Slope [more…]

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