Question

http://prntscr.com/2tafvb

Answer 1

hint : in a kite 'non-vertex' angles are congreunt

Answer 2

hint2 : \(A\) and \(C\) are non-vertex angles

Answer 3

As @ganeshie8 is trying to tell you that A=C, hence
A+B+C+ D=360
87+B +87 +115=360
B=71