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Fr̶̰̋͝ē̷͓̚e̶͎͌Oñḻíŋe̷̼͒Us̶͍̈... | 1 months ago (raw) | root | parent | reply | flag 
 inside a triangle is 180 so 180-60-40=80
flat surface is 180 so 180-80=100
100 if flat, so minus the 35 for incline so 100-35=65