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How to Make a Sphere in GeoGebra

GeoGebra has two tools that can be used to draw spheres in 3D-space:

If you want to draw an arbitrary sphere, choose Item 4.
If you know the radius and center of your sphere, choose Item 4.

GeoGebra Instruction 1

Drawing a Sphere Using the `Sphere: Center & Point` Tool

1.: Open Algebra View and 3D Graphics under View in Menu.
2.: Click on the Sphere: Center & Point tool.
3.: Click on a desired point in 3D Graphics. This point will be the center of the sphere.
4.: Decide the size of the sphere by moving the cursor towards or away from the center.

GeoGebra Instruction 2

Drawing a Sphere Using the `Sphere: Center & Radius` Tool

1.: Open Algebra View and 3D Graphics under View in Menu.
2.: Click on the Sphere: Center & Radius tool.
3.: Click on a desired point inside of 3D Graphics. This point will be the center of the sphere.
4.: GeoGebra will now ask you to type in the radius of the sphere. Type in the desired radius. The sphere will then appear in 3D Graphics.

Alternatively, you can type

Sphere(Point, Radius)

in Algebra View, inputting the coordinates of the center of the sphere in the Point field, and the radius of the sphere in the Radius field.

Example 1

Draw a sphere with its center at (1, 3, 2) and a radius of 2.

Follow Item 4 for this exercise. Type

Sphere(Point, Radius)

in Algebra View. Then type the relevant values into the fields where they belong. The sphere will now appear in 3D Graphics.

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