Sorting 2-dimensional shapes worksheet for educational use.

To solve this task, we need to identify which shapes have square corners (right angles) and which do not. A square corner is an angle that measures 90 degrees, like the corner of a piece of paper or a book.

Let’s go through each shape one by one:

1. Circle – No corners at all → no square corners.
2. Rectangle – All four corners are square → has square corners.
3. Right triangle – One corner is square → has square corners.
4. Pentagon with one right angle – One corner looks square → has square corners.
5. Trapezoid-like shape – No obvious square corners → no square corners.
6. Square – All four corners are square → has square corners.
7. Semicircle – No corners → no square corners.
8. Hexagon – All angles are equal but not 90° → no square corners.
9. Right triangle – One corner is square → has square corners.
10. Irregular quadrilateral – No square corners visible → no square corners.
11. Trapezoid – Two corners look square → has square corners.
12. Right trapezoid – Two corners are square → has square corners.

Now, let’s list them:

Shapes with square corners: 2, 3, 4, 6, 9, 11, 12
Shapes without square corners: 1, 5, 7, 8, 10

Final Answer:
Shapes with square corners: 2, 3, 4, 6, 9, 11, 12
Shapes with no square corners: 1, 5, 7, 8, 10