# GeoGebra 3D: Getting Started - Part 3

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

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.

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.

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.