A) \[\text{90 }\!\!{}^\circ\!\!\text{ }\]
B) \[\text{180 }\!\!{}^\circ\!\!\text{ }\]
C) \[\text{360 }\!\!{}^\circ\!\!\text{ }\]
D) \[\text{280 }\!\!{}^\circ\!\!\text{ }\]
Correct Answer: B
Solution :
1 right angle \[\text{=90 }\!\!{}^\circ\!\!\text{ }\] \[\therefore \] 2 right angles \[=\text{ }90{}^\circ \text{ }+\text{ }90{}^\circ \text{ }=\text{ }180{}^\circ \]
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