Which of the following statements is/are true?
1
The sum of interior angles in a traverse is (2N + 4)× 90º, Where N is number of sides of traverse.
2
The sum of deflected angles should be equal to 90º× N, where N is number of sides of traverse.
3
The sum of exterior angles in a traverse is (2N + 4)× 90º, Where N is number of sides of traverse
4
The fore bearing of the last line should be equal to its back bearing ± 180º measured at its initial station