If we know that line [tex]AB[/tex] is equal to line [tex]AD[/tex], then this means that ∠[tex]ADB[/tex] has to be equal to ∠[tex]ABD[/tex] in order to form a closed triangle. All angle measures of a triangle add up to [tex]180[/tex]°, so use the equation: [tex]2(35) + x = 180[/tex].
70 + x = 180
Subtract 70 from both sides to isolate x:
180 - 70 = 110
110 = x
Hope this helped.
