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Mathematics 17 Online
OpenStudy (anonymous):

no need to spy on my questions

OpenStudy (anonymous):

Option (D) ??? @Luis_Rivera

OpenStudy (anonymous):

|dw:1365641141174:dw| Since the inner angles are vertically opposites of the marked angles, inside the quadrilateral the angles would be 90,60,x and x... so 90 + 60 + x+x = 360 i.e. x=105 Please comment if any flaw...

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