On any particular side there are two lines that connect to each number. But you follow the line alighted with the number on that axis towards whatever point inside the triangle.
Go from the axis to the point instead of the point to the axis.
Although, you can still figure out which line is for which axis based off the angle of the number.
For example, the numbers for clay are horizontal and are associated with the horizontal lines.
Follow the lines that match the angles of the numbers.
But which way? I can go to two different ways towards a side
On any particular side there are two lines that connect to each number. But you follow the line alighted with the number on that axis towards whatever point inside the triangle.
Go from the axis to the point instead of the point to the axis.
Although, you can still figure out which line is for which axis based off the angle of the number.
For example, the numbers for clay are horizontal and are associated with the horizontal lines.
Ah, okay, the “angle of the number” part helped. It makes sense now.