Autocad stretch command and angles

Hi, I’m having a few issues:
My stretch command moves sometimes instead of stretching, and the stretching assignment for homework, I’m trying to figure out why you select on certain parts and not the other parts. I also still get confused by arcs and angles. I basically am very confused by the stretch command, arcs, and why you sometimes do the opposite by angles, for example, 60 instead of 30.
Thank you so much for all your help!

  1. Make sure you are using the green selection box (cross selection) when stretching the object
  2. A 30 degree setting will give every 30 degrees
    [copy homework.dwg] - Autodesk AutoCAD 2025 - [copy homework.dwg] - 4 December 2024 | Loom
  3. [circle, rectangle, ellipse, polygon exercise.dwg] - Autodesk AutoCAD 2025 - [circle, rectangle, ellipse, polygon exercise.dwg] - 8 December 2024 | Loom