plz tell q-40 step by step
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Answer:In ABC
A=90
B=C
In a triangle sum of all interior angles =180
A+B+C=180
90+B+C=180
90+B+B=180
2B=180-90
2B=90
B=90/2
B=45
C=45
By linear pair
45+x=180
x=180-45
x=135
A=D
Sum of all interior angles of a =180
C+D+A=180
135+A+D=180
A+D=180-135
A+A=45
2A=45
A=45/2
A=22.5
D=22.5
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