Optical Illusions

| View Cart ⇗ | Info

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the lengths of lines a and b are the same. You would need to measure to be sure of your conclusion.

Source

C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 21

Downloads

TIFF (full resolution)

2219×2400, 176.5 KiB

Large GIF

946×1024, 13.9 KiB

Medium GIF

591×640, 8.4 KiB

Small GIF

295×320, 4.2 KiB