Casio ClassPad II fx-CP400 Examples User Manual download pdf (Page 31)

Chapter 8: Geometry Application 31

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1. Tap [Draw], [Special Polygon], and then [Regular n-gon].

• This displays the n-gon dialog box.

2. Enter a value indicating the number of sides of the polygon, and then tap

[OK].

3. Place the stylus on the screen and drag diagonally in any direction.

• This causes a selection boundary to appear, indicating the size of the

polygon that will be drawn. The polygon is drawn when you release the

stylus.

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1. Draw a line segment AB and plot point C, which is not on line segment AB.

2. As shown in the nearby screen, draw line segments DE and DC.

3. Select only line segments AB and DE, and then tap u on the toolbar to

display the measurement box.

4. Input 90 into the measurement box and press E.

• This fixes the angle between AB and DE at 90 degrees.

5. Select only line segments DE and DC, and then tap the down arrow next to

the measurement box.

6. Tap the e icon, and then select the check box to the right of the

measurement box.

• This makes line segments DE and DC congruent in length.

7. Select only point E and line segment AB, and then tap [Edit] - [Animate] -

[Add Animation].

8. Select only point D, and then tap [Edit] - [Animate] - [Trace].

• This should cause a parabola to be traced on the display. Note that line

segment AB is the directrix and point C is the focus of the parabola.

9. Tap [Edit], [Animate], and then [Go (once)].

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Casio ClassPad II fx-CP400 Examples User Manual Page 31