General

I got arc BCD with the length of 140.
Add that to 34 you get 174
Divide by 2 is 87, which is the angle of AOE and BOD
Minus that from 180 you get 93
there's your answer

Isn't that 90 degrees?

The quadrilateral has to have one 90 degree angle or something like that and the other side has to be congruent if it is 90.

[quote=IHateYoungMoney]I think Semi Circle - 34 Degrees = 146 Degrees. I'm learning this type of stuff with secants and tangents but haven't actually gotten up to quadrilaterals inside a circle.[/quote]

nvm hoho