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I need help in part b) of the question

thank you

Please show me your answer, with working , for part a

This is what I got

360-90 = 270˚ 270˚= 3x + 2x + x 270˚/3= 90 90/2=45 x=45˚

Yes that is great.

x=45

So angle DAB=90 and you know that angle ABC=90

So pow can you use that to determine if AD and BC are parallel?

Thank youuu!!!

I get it know :)