The problem is written in Hebrew and appears to involve trigonometry, with a trapezoid labeled $ABCD$ and several questions based on it. I will summarize the questions and diagram setup for better understanding:

1. The figure shows a trapezoid $ABCD$, with segment $AE$ perpendicular to $BC$ and creating two triangles $ACD$ and $DAE$.
2. Given:
   • Height $AE = 12 \, \text{cm}$,
   • Angle $\angle DAE = 35^\circ$,
   • It asks to:
     • (a) Find the angles $\angle ACD$ and $\angle DAE$,
     • (b) Calculate the length of the shadow (likely $AC$),
     • (c) Compute the area of the trapezoid $ABCD$.

To solve this step by step:

1. Step A: Calculate $\angle ACD$ and $\angle DAE$:

   • Using the information about angles, trigonometric identities, or properties of the trapezoid, we can calculate these angles.

2. Step B: Calculate $AC$:

   • Using trigonometric ratios (since $AE$ is given and the angle at $DAE = 35^\circ$), we can find the length of $AC$.

3. Step C: Calculate the area of the trapezoid:

   • The formula for the area of a trapezoid is given by: $\text{Area} = \frac{1}{2} \times (\text{Base}_1 + \text{Base}_2) \times \text{Height}$ where $AE$ is the height and $AB$, $DC$ are the bases.

Let me start calculating these parts based on the given information.

If you have any questions or want detailed steps, feel free to ask!

Questions:

1. What is the importance of the 35° angle in trigonometry, and how do we use it in solving problems?
2. Can we find the length of diagonal $AC$ using the sine or cosine of the given angle?
3. What are the steps to compute the area of a trapezoid if only the height and one base are given?
4. How do trigonometric functions help in determining the unknown sides of a triangle?
5. Could we solve this problem using a different geometric approach, such as similar triangles?

Tip:

Remember that trigonometric identities such as sine, cosine, and tangent relate the angles of a triangle to the lengths of its sides, which can be very useful for solving geometry problems!