Question

in the figure AB||CD,FAE=90°,AFE=40°

Answer 1

∠FEB=∠AFE+∠FAE     −−(Sum of interior angle of a ∆ is equal to its exterior angle)⇒∠FEB=40°+90° ⇒∠FEB=130°Now, ∠FEB=∠ECD=130°     −−(corresponding angles as AB∥CD)

Regards

Answer 2

Answer:

130

Step-by-step explanation:

By angle sum property in triangle FAE.

90 + 40 + AEF = 180

Or, AEF = 50

CEB = AEF = 50 (vertically opp. angles)

ECD + CEB = 180

Or, ECD + 50 = 180

ECD = 130

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