The problem you're asking about is in Romanian and appears to involve right-angled triangle geometry with several given measurements. Here's a quick translation of the key elements:

Problem 7 in right-angled triangle ABC, with:

• $\angle A = 90^\circ$
• $AD \perp BC$, $D \in BC$, and $AM$ is a median, $M \in BC$
• Given: $AD = 6\sqrt{3}$ cm and $AM = 12$ cm.

Calculate: a) The area and perimeter of triangle ABC
b) What percentage of the area of triangle ABC is represented by the area of triangle ABD?

To solve the problem, we need to proceed step by step:

Step 1: Find information about triangle ABC

• $AD$ is the height, and $BC$ is the base of triangle ABC.
• Using the given information about the median $AM$, we can use relationships in right-angled triangles to find missing sides.

Let's start solving based on the information you provided. Would you like me to calculate the exact area and perimeter of triangle ABC or clarify specific aspects first?