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/sci/ - Science & Math

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>> No.8416377 [View]
File: 671 B, 151x151, rect6614.png [View same] [iqdb] [saucenao] [google]
8416377

>>8416224
Blue squares are 4x4, red are 3x3.

Top/left sides are 3*4+1*3=12+3=15
Bottom/right sides are 3*5=15
Area is 9*((4/15)^2+(3/15)^2)
=9*(16/225+9/225)
=9*25/225
=225/225
=1

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