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 Interactive Checkpoint
 Plane:  One of the basic undefined terms of geometry. A plane goes on forever in all directions (in two-dimensions) and is "flat" (i.e., it has no thickness).

Answer the following questions about planes.

Choose each answer from the menus.
Graded Response

a) A three dimensional plane looks like what quadrilateral in two dimensions?

 

a) 

b) What is the intersection of two planes that are not identical?

 

b) 
c) What is the intersection of three planes (given that they intersect)? c) 
  OR