Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 112
he formof a letter T, as here shown, and he shouldbe asked which is the longer, AB or CD.A figure that is very deceptive, par-ticularly if drawn larger and withheavy cross lines, is this one in whichAB and CD are really parallel, butdo not seem to be so. Other inter-esting deceptions have to do… … deceptive is this figure, in which it is difficult to tellwhich line AB will lie along when produced. In thenext figure AB appears to be curvedwhen in reality it is straight, and CDappears straight when in reality it iscurved. The first of the followingcircles seems to be slightlyflattened at the…
Geometry
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