Fill in the blanks so as to make the following statements true: 

(i) If one angle of a linear pair is acute, then its other angle will be _____ 

(ii) A ray stands on a line, then the sum of the two adjacent angles so formed is ______ 

(iii) If the sum of two adjacent angles is 180°, then the ______ arms of the two angles are opposite rays. 


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(i) Obtuse angle 

(ii) 180o 

(iii) uncommon