If every one of the three angles of a triangle have a probable error o – McqOptions

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1.	If every one of the three angles of a triangle have a probable error of \( \pm1''\), then what will be the probable error in the sum of the measured internal angles of the triangle?
A.	\( \pm 1''\)
B.	\( \pm 3''\)
C.	\( \pm 9''\)
D.	\( \pm \sqrt {3''}\)
Answer» E.

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