Bearings and Angle Calculations

The video tutorial covers a problem in commerce surveying, focusing on correcting four and back bearings using included angles. It explains the concept of whole circle bearings, how to draw a traverse, and the process of calculating and verifying interior angles. The tutorial also addresses error correction in bearings and concludes with a final verification of the calculations.

What is the main focus of the problem discussed in the video?

• Historical analysis of trade routes

• Chemical reactions in a lab

• Commerce surveying with local attraction

• Mathematical calculations in physics

What is the starting point for measuring whole circle bearings?

• West

• South

• East

• North

In which direction are all readings taken in whole circle bearing?

• Counter-clockwise

• Clockwise

• Random

• Vertical

What is the fore bearing of line AB?

• 62 degrees

• 342 degrees

• 158 degrees 30 minutes

• 281 degrees

How is the back bearing of a line determined?

• By reversing the direction of the fore bearing

• By subtracting 90 degrees from the fore bearing

• By doubling the fore bearing

• By adding 90 degrees to the fore bearing

What is the back bearing of line BA?

• 242 degrees

• 101 degrees 30 minutes

• 339 degrees

• 163 degrees

What is the purpose of checking back bearings?

• To calculate the area

• To find the shortest path

• To ensure the drawing is correct

• To determine the height

How are included angles found in the traverse?

• By subtracting one angle from another

• By adding all angles

• By multiplying angles

• By dividing angles

What is the theoretical sum of angles for a five-station traverse?

• 720 degrees

• 540 degrees

• 360 degrees

• 180 degrees

What is the error found in the sum of observed angles?

• 3 degrees

• 2 degrees

• 4 degrees

• 1 degree 30 minutes