First, when the traverse observes the horizontal angle, it should turn clockwise from the 0 direction to the direction to be measured in the first measurement, and counterclockwise from the direction to be measured in the second half measurement. The next test is still in this order. Both the left angle and the right angle should be observed in the order measured above, that is, clockwise and counterclockwise. ?

Second, it is very important that traverse observation has a direction to go. Where do you want to measure? The left corner of the forward direction is the left corner. On the right is the right corner. After the observation is completed, if you want to calculate this traverse reversely, you must change the left and right angles.

Related information:

Mathematics [English: Mathematics, derived from the ancient Greek μ θ η μ α (má th ē ma); Often abbreviated as math or maths], it is a discipline that studies concepts such as quantity, structure, change, space and information.

Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.

Mathematics plays an irreplaceable role in the development of human history and social life, and it is also an indispensable basic tool for studying and studying modern science and technology.