A) \[{{90}^{{}^\circ }}\]
B) \[{{50}^{{}^\circ }}\]
C) \[{{80}^{{}^\circ }}\]
D) \[{{105}^{{}^\circ }}\]
Correct Answer: A
Solution :
(a): \[\angle BCD=\angle BCM+\angle DCM\] \[=\angle ABC+\angle EDC={{57}^{{}^\circ }}+{{33}^{{}^\circ }}={{90}^{{}^\circ }}\]You need to login to perform this action.
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