Spherical triangles
Task
Create a triangle on a sphere.
Explore the construction and learn how to create spherical triangles with GeoGebra 3D Calculator. Then try it yourself by following the instructions below.
Explore the construction...
Instructions
| 1. | | In the Algebra View enter and the command into the Input Bar. |
| 2. | | Select the sphere in the 3D Graphics View and choose  Color in the appearing Style Bar to change the spheres color.
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| 3. |  | Open the Settings and deselect Show Axes and Show Plane to hide the axes and the plane. |
| 4. | | Switch to the Tools View. |
| 5. |  | Select the Point tool and create three points B, C and D on the sphere. |
| 6. |  | Use the Circular Arc tool to first select center A and then B and C. Repeat this step twice with the other points to create a spherical triangle (always select point A first). |
| 7. |  | Use the Move tool to drag the points on the sphere to explore your construction. |
Try it yourself...
Augmented Reality
If you're using GeoGebra 3D Calculator on a mobile device you can switch to AR mode to place your created math objects on any flat surface (e.g. table, floor, ...) around you and walk around them. Explore your constructions from a new perspective!