Geometry Mode Overview

Geometry

Application

User’s Guide

For fx-9860G Series/GRAPH 75/85/95 Series

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Contents

Contents

1 Geometry Mode Overview

2 Drawing and Editing Objects

3 Controlling the Appearance of the Geometry

Window

4 Using Text and Labels in a Screen Image

5 Using the Measurement Box

6 Working with Animations

7 Error Messages

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Geometry Mode Overview

1. Geometry Mode Overview

The Geometry Mode allows you to draw and analyze geometric objects. You can draw a

triangle and specify values to change the size of its sides so they are 3:4:5, and then check

the measurement of each of its angles. You can also lock the coordinates of a point or the

length of a line segment, and you can draw a circle and then draw a line that is tangent to a

particular point on the circle. The Geometry Mode also includes an animation feature that lets

you watch how an object changes in accordance with conditions you define.

Geometry Mode Menus

Unlike other modes, the Geometry Mode does not have function menus along the bottom of

the screen. Instead, it uses menus named [F1] through [F6] and [OPT], like the ones shown

below.

The following is a general explanation of Geometry Mode menus.

• Pressing a key that corresponds to a menu ([F1] through [F6] or [OPT]) will display the Pressing a key that corresponds to a menu ([F1] through [F6] or [OPT]) will display the[F1] through [F6] or [OPT]) will display the through [F6] or [OPT]) will display the[F6] or [OPT]) will display the or [OPT]) will display the[OPT]) will display the) will display the

menu for that tab.

• After displaying a menu, use After displaying a menu, use C and B to move between menu screens.

• To close a menu without selecting anything, press To close a menu without selecting anything, press ) .

I Menu Operations in This ManualMenu Operations in This Manual

This manual shows menu operations using the following form: (Draw) – 5:Vector. When

you see this, it means you can perform either of the following two operations.

• Press Press  to display the Draw menu, use A and D to highlight “5:Vector”, and then

press U.

• Press Press  to display the Draw menu and then press D.

Menu Reference

The following tables describe the menu items that appear on each of the Geometry Mode

menus.

I (File)

To do this: Select this menu item:

Create a new file 1:New

Open a file 2:Open

Save a file under a new name 3:Save as

Display a list of functions assigned to each key 4:Key Help

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Geometry Mode Overview

I C(View)

To do this: Select this menu item:

Start a box zoom operation 1:Zoom Box

Enter the pan mode (page 3-3) 2:Pan

Enter the scroll mode (page 3-4) 3:Scroll

Enlarge the display image 4:Zoom In

Reduce the size of the display image 5:Zoom Out

Adjust the size of the display image so it fills the display 6:Zoom to Fit

I (Edit)

To do this: Select this menu item:

Undo or redo the last operation 1:Undo/Redo

Select all objects on the screen 2:Select All

Deselect all objects on the screen 3:Deselect All

Select an entire polygon (page 2-8) 4:Select Figure

Delete the currently selected object 5:Delete

Clear the screen 6:Clear All

I (Draw)

To do this: Select this menu item:

Plot a point 1:Point

Draw a line segment 2:Line Segment

Draw a straight line 3:Infinite Line

Draw a ray 4:Ray

Draw a vector 5:Vector

Draw a circle 6:Circle

Draw an arc 7:Arc

Draw a triangle 8:Triangle

Draw an isosceles triangle 9:Isosc Triangle

Draw a rectangle A:Rectangle

Draw a square B:Square

Draw a polygon C:Polygon

Draw a regular n-gon D:Regular n-gon

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Geometry Mode Overview

I (Construct)

To construct this: Select this menu item:

A perpendicular bisector 1:Perp Bisector

A perpendicular 2:Perpendicular

A midpoint 3:Midpoint

An intersection 4:Intersection

An angle bisector 5:Angle Bisector

A parallel 6:Parallel

A tangent 7:Tangent

I (Transform)

To do this: Select this menu item:

Reflect an object 1:Reflection

Translate an object by specified values 2:Translation

Translate an object using an existing vector 3:Trans(Sel Vec)

Rotate an object 4:Rotation

Dilate an object 5:Dilation

I (Animate)

To do this: Select this menu item:

Add animation to two selected objects 1:Add Animation

Replace the current animation assigned to two selected

objects 2:Replace Anima

Turn on trace for a point and trace the movement of the point

while animation is being executed 3:Trace

Display the animation editing screen 4:Edit Animation

Perform an animation sequence once 5:Go (once)

Perform an animation sequence repeatedly 6:Go (repeat)

Add one or more values to the animation table (page 6-7) 7:Add Table

Display the animation table 8:Display Table

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Geometry Mode Overview

I * (Option)

To do this: Select this menu item:

Input text 1:Text

Input an expression 2:Expression

Specify the number format Geometry Mode measurements 3:Number Format

Unlock all measurements 4:Clr Constraint

Display all objects 5:Show All

Hide the currently selected object 6:Hide

Using the Pointer

You can use the following operations to move the on-screen pointer ( () around the display

when drawing objects, editing objects, etc.

S To move the pointerTo move the pointer

Use the cursor keys to move the pointer around the display. Holding down a cursor key

moves the pointer at high speed.

S To make the pointer jump to a particular locationTo make the pointer jump to a particular location

Pressing a number key (@ to H) will cause the pointer to jump to the corresponding

section of the screen as shown below.

FGH

CDE

@AB

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Geometry Mode Overview

Using Key Help

Pressing (File) – 4:Key Help or the ? key will display Key Help, which provides

information the function of each key in the Geometry Mode.

Use the A and D keys to navigate between the three Key Help screens.

To exit the Key Help screens, press ) .

Note

The key operations shown on the Key Help screens apply to the drawing screen only.

Managing Geometry Mode Files

This section explains how to save Geometry Mode data to files, and how to manage your

files.

Note

Whenever you save a file in the Geometry Mode, it is stored in main memory in a folder

named “<@GEOM>”. You can use the calculator’s MEMORY mode to view the data in main

memory. For more information, see the manual that comes with your calculator.

S To create a new fileTo create a new file

1. Perform the following operation: (File) – 1:New.

• The following dialog box will appear if you have a drawing on the screen. The following dialog box will appear if you have a drawing on the screen.

2. To clear the current drawing and create a new file, press (Yes).

• This will create a new file and display a blank drawing screen. This will create a new file and display a blank drawing screen.

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Geometry Mode Overview

S To open an existing fileTo open an existing file

1. Perform the following operation: (File) – 2:Open.

• This displays a menu of existing files. This displays a menu of existing files.

2. Use A and D to move the highlighting to the file you want to open and then press U.

• The following dialog box will appear if you have a drawing on the screen. The following dialog box will appear if you have a drawing on the screen.

3. To clear the current drawing, press (Yes).

• This will open the file you selected in step 2. This will open the file you selected in step 2.

S To delete a fileTo delete a file

1. Perform

...