How_angle_greater_than_90¬¨¬®‚Äö√†√ª_is_measured?$#

1.	How_angle_greater_than_90¬¨¬®‚Äö√†√ª_is_measured?$#
A.	By repeating gauges
B.	Using square plate
C.	Using sine bar
D.	Using auto collimator
Answer» C. Using sine bar

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