Answer: 60 degrees
if angle dgc equals 90 (the little square means right angle which is 90 degrees) that means dga equals 90 too (because they are supplementary angles which equal 180 together)
90 - 30 = 60 (minus 30 bc 30 needs to be subtracted in order to find angle dge)
vertical angles are equivalent so x = 60
:)
