Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?

Explanation

To create a shape that gives a circular shadow when held in one way and a rectangular shadow when held in another way, we can use a cylinder. Here’s how we can understand this:

### Step-by-Step Solution:

1. **Identify the Shape**: The shape we will use is a cylinder. A cylinder has two different types of surfaces: a curved surface and two flat rectangular surfaces (the top and bottom).

2. **Positioning the Cylinder**:
- **For Circular Shadow**: Hold the cylinder upright so that the light source shines directly on the curved surface.
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