Question

In the given figure, AB || CD, ∠FAE = 90°, ∠AFE = 40°, find ∠ECD.​

Answer 1

Answer:

130 degree is the answer

Step-by-step explanation:

By angle sum property in triangle FAE.

90o + 40o + AEF = 180o

Or, AEF = 50o

CEB = AEF = 50o (vertically opp. angles)

ECD + CEB = 180o

Or, ECD + 50o = 180o

ECD = 130o

Answer 2

Answer:

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