Question

in the figure, ADF and BDF are triangles and EC=ED,then y=​

Answer 1

Step-by-step explanation:

Option A) 90°

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Answer 2

Answer:

angle y is 90

angle d=angle c

because Ed=EC

angle ecd=angle acb ,(vertically opp. angle)

in triangle ABC. angle bac is 90

angle in triangle is 180

Step-by-step explanation:

angle bac + angle fac = 180 (adjacent angle)

90 + y = 180

y = 90