Question

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Answer 1

Well we know that A+B+C=180
and we know that A=45 and B=90
so together there 135     
180-135=45 
so C=45
now we also know that a straight line is 180 degrees so 180-45 =135(angle f)
135+15(angle e)=150
180-150=30
so angle d=30

Answer 2

45 and 30 that is the answer