Question

find the value of x and give full explanation of both figures

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Answer 1

Answer:

c) Sum of all interior angles of a quadrilateral= 360°

thus,110+100+80+DAB=360°

290+DAB=360

DAB=360-290=70°

we can see 70+x=180 (linear pair)

x=180-70

x=110°

hope it helps