150 is your correct answer
I think this answers all the parts
Hope this helped :)
Its the red one bc its between 1 and 12
Answer:
<h2>√126</h2>
Option D is the right option.
solution,

Hope this helps..
Good luck on your assignment.
Hope
Essentially, what we need to do here is prove that BE=EC, BE=CB, and.or CE=BC therefore making it isosceles. With ∠AEC=∠DEB, we know AE=DE, so EC=EB (the points go in order). Therefore, as EC=EB, BEC is isosceles (it has at least 2 equal sides).
Feel free to ask further questions!