1) On your non-iOS device, open GeoGebra 3D Graphing Calculator. [br]2) Press the 3 horizontal bars (upper left corner). Select OPEN. [br][br]3) In the SEARCH TAB that appears, type [b]NNUNEtR8[/b]. [br] Be sure to either copy & paste this code or type it just the way you see it here. [br] You should see a rectangular prism appear. [br][br]4) In the algebra window below, scroll upwards until you see sliders labeled [b]o[/b], [b]q[/b], & [b]r[/b]. [br] (See first few seconds in video below). [br][br]5) Press the [b]AR[/b] button lower right, and get this prism to be shown in Augmented Reality. [br][br]6) Move sliders [b]o[/b], [b]q,[/b] & [b]r[/b] around to change the length, width, and height of this rectangular prism. [br][br]7) Now, below, find the[b] i [/b]slider (located 2 rows above the o slider). [br] Slide this slider slowly. Carefully observe what takes place here. [br][br][br]8) If the box measures 3 ft by 4 ft by 5 ft, how can we find the length of this prism's diagonal? [br] That is, how can we find the distance from one corner of this prism to its opposite corner? [br][br]9) Same directions for step (8), yet this time for a box that measures 5 ft by 5 ft by 5 ft. [br] How about for a room that measures 13 ft by 15 ft and is 10 ft high? [br] [br]