Given defgh ≅ qrstu . what is the measure of ∠r ?

DEFGH ≅ QRSTU

That would mean R would equal the same as E.
So the answer is 143°

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!