In the figure below, ABCD is a square, MDC is an equilateral triangle. Find the value of x.


(a) 75°              (b) 90°                  (c) 105°                 (d) 60°
 

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105
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105degree
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= 180 - 30 + 45 = 180 - 75 = 105 So, the answer is 105 degrees
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