Let’s analyze the geometry of the figure and answer each question one by one.

Given Data:

• ∠BAC = ∠BAE = 20°
• ∠ABC = 50°
• ∠ADE = 30°

Steps to solve each angle:

A. ∠BAE:

From the figure, it's given that ∠BAE = 20°.

B. ∠ADE:

This is already labeled in the diagram as 30°.

C. ∠BCA:

We know that triangle $\triangle ABC$ is a triangle with angles:

• ∠ABC = 50°
• ∠BAC = 20°

To find ∠BCA: $\text{Sum of angles in a triangle} = 180^\circ$ $\therefore \angle BCA = 180^\circ - \left( \angle ABC + \angle BAC \right)$ $= 180^\circ - (50^\circ + 20^\circ) = 110^\circ$

D. ∠ACD:

In triangle $\triangle ACD$, we will calculate angle ∠ACD. From the exterior angle theorem: $\angle ACD = \angle BCA - \angle CAD$ But first, we need to find ∠CAD in part F.

E. ∠ADC:

We will calculate ∠ADC after finding ∠ACD and ∠CAD in part F.

F. ∠CAD:

Now, since triangle $\triangle ACD$ is isosceles (∠BAE = ∠BAC = 20°), we can apply properties of isosceles triangles. We need more clarification on the segments to accurately calculate it, or we can assume symmetry to deduce that ∠CAD could also be derived from symmetry considerations.

Would you like to go through detailed solutions for parts D, E, and F, or do you want to clarify any assumptions before proceeding?

Here are 5 related questions that could help expand your understanding:

1. How does the exterior angle theorem apply to the calculation of unknown angles in triangles?
2. What are the properties of isosceles triangles, and how are they useful here?
3. Can the sum of interior angles of a polygon be generalized beyond triangles?
4. How would you use trigonometric identities to verify angle measures?
5. How does symmetry in geometric figures help simplify problem-solving?

Tip: When working with geometry, always verify your results using both angle sum properties and symmetry, especially in complex diagrams.