GeoGebra Tools that should be substituted to create a dynamic geometry environment for spacetime:
1- Midpoint or Center
2- Complex Number
3- Segment with given Length
4- Perpendicular Line
5- Perpendicular Bisector
6- Angle Bisector
7- Polar or Diameter Line
8- Circle with Center through Point
9- Circle with Center and Radius
10- Compass
11- Circle through 3 Points
12- Semicircle through 2 Points
13- Circular Arc
14- Circumcircular Arc
15- Circular Sector
16- Circumcircular Sector
17- Angle
18- Angle with Given Size
19- Distance or Length
20- Reflect About Line
21- Reflect About Circle
22- Rotate Around Point