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How to Make a Sphere in GeoGebra

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

  • If you want to draw an arbitrary sphere, choose Item 4.

  • If you know the radius and center, choose Item 4.

GeoGebra Instruction 1

Drawing a Sphere Using the Tool Sphere: Center & Point

1.
Open Algebra View and 3D Graphics under GeoGebra icon View in GeoGebra icon Menu.
2.
Click on the tool Sphere: Center & Point GeoGebra icon.
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 toward or away from the center.

GeoGebra Instruction 2

Drawing a Sphere Using the Tool Sphere: Center & Radius

1.
Open Algebra View and 3D Graphics under GeoGebra icon View in GeoGebra icon Menu.
2.
Click on the tool Sphere: Center & Radius GeoGebra icon.
3.
Click on a desired point in 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 now appear in 3D Graphics.

Alternatively, you can type

Sphere(Point, Radius)

in Algebra View where you type in the center of the sphere in the Point field and the radius in the Radius field.

Example 1

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

Follow Item 4 for this exercise. Type in

Sphere(Point, Radius)

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

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