Answer:
∠ BAC + ∠ BCA = ∠ CBE
Step-by-step explanation:
See the attached diagram of the triangle.
We know from the property of angles of a triangle, the sum of any two interior angles is always equal to the opposite exterior angle.
Now, ∠ BAC and ∠ BCA are two interior angles of Δ ABC. Therefore, the opposite exterior angle is ∠ CBE.
Hence, ∠ BAC + ∠ BCA = ∠ CBE (Answer)
