Question

plz help..........................​

Answer 1

Answer:

Hello there!

Step-by-step explanation:

In triangle BED: (∠EBD = B, ∠BED=∠EDB= x ( since isosceles)

=> B+2x=180.....................1

Similarly In triangle DFC:

=>C+2y=180.......................2

& In triangle ABC:

90+B+C=180 => B+C=90

Adding 1 and 2 we get, B+C+2x+2y = 360 ( & we know B+C= 90)

so, 2(x+y)=270 => x+y=135.

From the fig. we know that : a+x+y= 180 (straight line).

by putting the value of x+y in above we get, a= 45*

Answer = B)

Hope it helps!