Tobin tried to define a translation.
Point AAA maps to point A'A

A, prime.
Every point PPP maps to point P'P

P, prime such that \overline{PP'}
PP


start overline, P, P, prime, end overline has the same length as \overline{AA'}
AA


start overline, A, A, prime, end overline.
What mistake did Tobin make in her definition of a translation?

Tobin tried to define a translation Point AAA maps to point AA A prime Every point PPP maps to point PP P prime such that overlinePP PP start overline P P prime class=