[b]Your Task:[/b][br][br]Recreate this lampshade in GeoGebra Augmented Reality by authoring 2 surface equations with domain restrictions. [br][br][b]Clues: [/b] [br][br]The 4 planes, if extended indefinitely, would intersect at (0, 0, 5). [br][br]For the [b][color=#1e84cc]blue planes[/color][/b], the ratio [math]\left|\frac{\Delta z}{\Delta y}\right|=2.1[/math][br][br]For the [b][color=#ff00ff]pink planes[/color][/b], the ratio [math]\left|\frac{\Delta z}{\Delta x}\right|=2.1[/math]. [br][br]The square opening at the top has a side length of 3 units. [br][br]The projection of any diagonal crease (where 2 lateral faces of this truncated pyramid meet) onto the plane z = 0 is either the line [math]y=x[/math] or [math]y=-x[/math]. [br][br]