What is the meaning of the triangles in the witness?

Question

There are strange Discarded Panels with yellow triangle markers scattered about the island in the Witness. The number of triangles in a square is related to the number of times a line can touch the square. March 24, 2016

Hagrid P Hazard · Accepted Answer

There are strange Discarded Panels with yellow triangle markers scattered about the island in the Witness. The number of triangles in a square is related to the number of times a line can touch the square. March 24, 2016

What is the meaning of the triangles in the witness?

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