Constructing a Parallelogram Using Input bar only

You can get even fancier. Construct a parallelogram by entering typing the following sequence of commands into the input box: A = (1,1) B = (4,5) l = line[A,B] C = (7,5) m = line[C,l] n = line[B,C] o = line[A,n] D = intersect[m,o] polygon[A,B,C,D] Additional commands you can use: ShowAxes[ <Boolean> ], ShowGrid[ <Boolean> ],