Let me analyze the uploaded image and extract its mathematical content to assist you with solving the problems. One moment, please.The image contains a set of geometry problems, written in Vietnamese, involving triangles, circles, and tangents. I'll break it down for clarity:

Problem Overview

1. Geometry Problem 1:

   • A triangle $\triangle ABC$ is given.
   • The radius of the incircle is 2 cm.
   • $BC = 8 \, \text{cm}$.
   • Find the distance between the incenter $I$ and side $BC$.

2. Geometry Problem 2:

   • Square Geometry:
     • A square $ABCD$ is drawn.
     • There are additional constructions such as circles and other intersecting geometric shapes within the square.
     • The task involves calculating the areas or distances between points.

3. Other Details:

   • A problem related to calculating the radius of a circumcircle.
   • Trigonometric calculations appear for specific triangle segments.

Would you like me to solve one or more of these problems? If so, specify which one, or provide additional clarification about the task you'd like help with.