1.

\left. \begin{array} { l } { 180 ^ { \circ } - 30 ^ { \circ } = } \\ { 180 ^ { \circ } - 90 ^ { 6 } } \\ { 180 ^ { \circ } - 110 ^ { \circ } = } \end{array} \right.

Answer»

(i) 150°(ii) 90°(iii) 70°



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