[OSM-newbies] Measuring angles from two positions sufficient to give location?

[Kelly Jones]

>From a known location X, three landmarks A, B, and C, form a triangle,
and I measure the 3 angles of the triangle.

>From a different known location Y, I do the same thing.

In both cases, I can only measure the angles between the landmarks,
not the distances.

Given this information, can I tell the positions of A, B, and C?

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