• PM_Your_Nudes_Please@lemmy.world
      link
      fedilink
      arrow-up
      2
      ·
      edit-2
      3 months ago

      The triangles aren’t drawn to scale. The middle line isn’t a 90° angle, because it isn’t specifically marked with a square angle in the corner. Triangles always add up to 180°, so the angle in the left triangle is actually 80°, not 90°.