A) \[{{120}^{{}^\circ }}\]
B) \[{{110}^{{}^\circ }}\]
C) \[{{125}^{{}^\circ }}\]
D) \[{{100}^{{}^\circ }}\]
Correct Answer: C
Solution :
(c): Extend CD to M then \[\angle DME=\angle ABC={{95}^{{}^\circ }}\] \[\angle MED={{30}^{{}^\circ }}\] \[\therefore \]\[\angle MDE={{180}^{{}^\circ }}-\left( {{95}^{{}^\circ }}+{{30}^{{}^\circ }} \right)={{55}^{{}^\circ }}\] \[\therefore \]\[\angle CDE={{180}^{{}^\circ }}-{{55}^{{}^\circ }}={{125}^{{}^\circ }}\]You need to login to perform this action.
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