Question

ABCD is a trapezium with AB parallel CD and angle BCD=twice angle DAB. If DC=a and BC=b, find the length of AB.
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Answer 1

Answer:

ABCD is a trapezium

AB parallel CD

ABC= DCA

AB=CD (Given)

AC= AC ( Common Side)

BCD= DAB (Given)

ABC= DCA (By SAS Rule)