Question

In fig. if AB || DE, ∠ BAC = 35° and ∠ CDE = 53°, then ∠ DCE will​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Given: AB || DE, ∠BAC = 35° and ∠CDE = 53°

To find: ∠DCE

We know that when two parallel lines are cut by a transversal, alternate interior angles formed are equal.

According to angle sum property of a triangle, sum of the interior angles of a triangle is 180°.

Since, AB || DE and AE is the transversal,

∠DEC = ∠BAC [Alternate interior angles]

Thus, ∠DEC = 35°

Now, in △CDE

∠CDE + ∠DEC + ∠DCE = 180° [Angle sum property of a triangle]

53° + 35° + ∠DCE = 180°

∠DCE = 180° - 88°

Thus, we have ∠DCE = 92°.