1. **Does the object have a square base?**
   - **Answer:** No
   - **Reasoning:** The images show that the base of the object is not square but rather a rectangular shape. The length and width of the base are not equal, which is evident from the different dimensions visible in the images.

2. **Is there a semi-circle attached to the top of the square?**
   - **Answer:** Yes
   - **Reasoning:** From the images, it is clear that there is a semi-circular shape attached to the top of the rectangular base. This semi-circle is consistent across all three images.

3. **Is the flat side of the semi-circle attached to the top of the square?**
   - **Answer:** Yes
   - **Reasoning:** The flat side of the semi-circle is indeed attached to the top of the rectangular base. This is visible in all the images where the flat side aligns directly with the top edge of the base.

4. **Is the entire sketch extruded?**
   - **Answer:** Yes
   - **Reasoning:** The images show that the object has a consistent depth throughout, indicating that the shape (including the semi-circle and the rectangular base) has been extruded to form a 3D object. The uniformity of the object's depth in all images supports this observation.