A) \[\text{5}{{\text{0}}^{\text{o}}}\]
B) \[\text{6}{{\text{0}}^{\text{o}}}\]
C) \[\text{7}{{\text{0}}^{\text{o}}}\]
D) \[\text{8}{{\text{0}}^{\text{o}}}\]
Correct Answer: C
Solution :
Let required angle be \[\theta .\] In \[\Delta ABC,\] \[{{90}^{o}}-\theta +{{140}^{o}}+{{20}^{o}}={{180}^{o}}\] \[\Rightarrow \] \[\theta ={{70}^{o}}\]You need to login to perform this action.
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