Answer:
Chain surveying is the type of surveying in which only linear measurements are made in the field. The main principle of chain surveying or chain triangulation is to provide a framework consist of a number of well-conditioned triangles or nearly equilateral triangles. It is used to find the area of the field.
Explanation:
By the mid 2030's. You can find it on their website.
I’m pretty sure you just add AB to BC, since they are all points on a line, those two segments add together to get the value of AC. Therefore, 12+16= 28, so AC=28