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Discussion on the classification of the second question of mathematics in Dalian senior high school entrance examination 20 1 1, how to find it when the overlapping shape is quadrilateral
A'(2t,2) B'( 1+2t,0)

A'B' equation, y=-2x+2+4t

AC equation: y=-x/2+2.

Let A'B' and AC intersect at m.

Then m (8t/3,2-4t/3)

When 3/2

When 0

=-5t? / 12+5/2