Answer:
The answer is option B.
Step-by-step explanation:
Let < D be x
Since the triangle isosceles < E is also the same as < D
Let < E also be x
Angles in a triangle add up to 180°
x + x + 102 = 180
2x = 180 - 102
2x = 78
Divide both sides by 2
x = 39°
Therefore m < D is 39°
Hope this helps you
