Which line is the longest?
A
B
C
All are the same
This illusion has a long research history. It seems that people living in urbanized areas perceive the lines as representing the corners of rectilinear objects viewed in perspective, being more susceptible to illusion than people from rural areas.
globalquiz.org
reach: rather globalgeometryillusionsoptical illusionstechnology
Answers by country
A
B
C
All are the same
answers
France
15
Malaysia
20
the Netherlands
25
Indonesia
16
Austria
52
Poland
21477
Australia
75
Germany
291
the United Kingdom
223
the United States
862
Singapore
21
Switzerland
33
Canada
68
Greece
18
Pakistan
17
India
330
Unknown
29
the United Arab Emirates
28
Republic of Ireland
16
the Philippines
44