You can quickly find intersections between lines, planes and spheres in GeoGebra
using the following sets of instructions.
GeoGebra
Instruction 1
3D Graphics
and Algebra View
under View
in Menu
. Algebra View
. If one or both of your objects are lines, then they must be added by using one of the Line
commands. Intersect(<object>, <object>)
and fill in the names of the objects as they appear in Algebra View
.
Graphics View
and Algebra View
. Example 1
Enter the equation of the sphere
in Algebra View
. Create a line with the command Line(<point>, <direction vector>)
. Choose as the point on the line, and as the direction vector of the line. Then, use the command
Intersect(<object>, <object>)
to find where the line intersects the sphere.