# GeoGebra 3D: Getting Started - Part 3

- Author:
- Tim Brzezinski

- Topic:
- Solids or 3D Shapes

## Next: Please watch this quick demo as to how you can easily create and alter sliders in GeoGebra 3D

## YOUR TASK BELOW:

In the next line (on the left) in the GeoGebra applet below,
1) Create a slider "a" that ranges from -8 to 8.
2) Use this slider to alter the equation (labeled "eq1") so that this slider, when dragged, causes this
turquoise sphere to translate up and down along the

**zAxis**(so that the z-coordinate of its center IS the value of slider "a" itself. 3) Now create a slider "b" that ranges from -8 to 8. 4) Use this slider to alter the equation (labeled "eq1") so that this slider, when dragged, causes this turquoise sphere to travel in the direction of the**xAxis**(so that the x-coordinate of its center IS the value of slider "b" itself. 5) Now create a slider "c" that ranges from -8 to 8. 6) Use this slider to alter the equation (labeled "eq1") so that this slider, when dragged, causes this turquoise sphere to travel in the direction of the**yAxis**(so that the y-coordinate of its center IS the value of slider "c" itself.## NEXT TASK:

Create another slider (with meaningful end values) and alter the equation of this sphere so that the value of this slider serves as the *radius* of this sphere. What would the equation of such a sphere be (in terms of sliders a, b, c, and your new slider? Write your equation below.

## NEXT TASK:

Now create yet another slider (with meaningful end values) and alter the equation of this sphere so that the value of this slider serves as the *diameter *of this sphere. What would the equation of such a sphere be (in terms of sliders a, b, c, and your new slider? Write your equation below.