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Question

In the given Δ ABC, AB = AC. The angle bisector of ∠A meets the side BC at the point E.
The measure of ∠BAE$ is degrees.

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Solution

The given triangle is as follows:

Given: AB=AC

We know that angles opposite to equal sides are equal in measure.
mB=mC=50o

Now, sum of all three interior angles of a triangle is 180o
mA+mB+mC=180o
mA+50o+50o=180o
mA=80o

Now, the line AE divides the A in two equal halves, BAE and CAE.

Hence, mBAE=mA2=80o2=40o

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