A) \[90{}^\circ \]
B) \[60{}^\circ \]
C) \[45{}^\circ \]
D) \[30{}^\circ \]
Correct Answer: D
Solution :
The three angles of a triangle \[=2x{}^\circ ,3x{}^\circ \,\,and\,\,7x{}^\circ \] \[\therefore 2x{}^\circ +3x{}^\circ +7x{}^\circ =180{}^\circ \] \[\Rightarrow \] \[12x{}^\circ =180{}^\circ \] \[x{}^\circ =15{}^\circ \] Then, the measure of the smallest angle \[=15{}^\circ \times 2=30{}^\circ \]
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