Question

The method of laying right angles with chain or tape is:
A. Three-four-five method
B. Chord method
C. Semi-circle method
D. Sine method
E. Offsets method
Choose the correct answer from the options given below:

• A. A, B, C Only
• B. B, C, D Only
• C. D, E, A Only
• D. E, A, B Only

Hint:

Right angle methods:
3-4-5 method (Pythagoras theorem).
Chord method.
Semi-circle method.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Laying right angles with chain or tape is a surveying technique.
There are several methods to do this.

Step 2: Key Formula or Approach:
No specific formula.
Need to know the methods for laying right angles.

Step 3: Detailed Explanation:
The methods of laying right angles with chain or tape are:
- Three-four-five method
- Chord method
- Semi-circle method
Sine method and offsets method are not used for laying right angles.
Thus, A, B, and C are correct.

Step 4: Final Answer:
The correct methods are A, B, and C.
Hence, the correct option is (A).