1.

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^(@)`

Answer» Correct Answer - c
(i) The diagonal BD bisects `/_B` and `/_ D` .
(ii) BCD is an isosceles righ angles triangle using this find `/_ CBD`.
(iiI) Given DMC is equilateral, so use this find `/_ MCB`.
(iv) Sum of the angles of a triangle is `180^(@)`. Using this find `/_ x`.


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