3d Shapes Worksheets 2nd Grade - Free Printable

Let's solve each riddle step by step using the clues and the shapes provided.

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Riddle 1:

> - I have some circular faces.
> - I have 2 curved edges.
> - I have no vertices (corners).
> - Who am I?

Let’s analyze the clues:

- Circular faces: This means at least one face is a circle.
- 2 curved edges: This suggests the shape has two curved boundaries (not straight lines).
- No vertices (corners): The shape has no sharp corners.

Now, look at the shapes:

- A (Cylinder):
- Has 2 circular faces (top and bottom).
- Has 2 curved edges (the curved sides where the circles meet the side).
- No vertices (no corners).
✔ Matches all clues.

- E (Cone):
- Has 1 circular face (base).
- Has 1 curved edge.
- Has 1 vertex (the tip).
✘ Doesn't match — has a vertex and only one circular face.

- C (Sphere):
- All faces are curved (no flat faces).
- No edges or vertices.
- But it has no circular faces — it's completely smooth and round.
✘ Doesn’t have "circular faces" as a feature.

So, only A (Cylinder) fits all clues.

✔ Answer to Riddle 1: Shape A

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Riddle 2:

> - I have 6 faces.
> - My faces are all squares or rectangles.
> - My faces are not all the same shape.
> - Who am I?

Analyze:

- 6 faces: So it's a hexahedron (like a cube or rectangular prism).
- Faces are squares or rectangles: So all faces are quadrilaterals, either square or rectangle.
- Not all faces are the same shape: So not all faces are identical — meaning it can't be a cube (where all faces are squares).

Now check the options:

- B (Cube):
- 6 faces.
- All faces are squares.
- But all faces are the same shape → ✘ violates “not all the same shape”.

- D (Rectangular Prism / Cuboid):
- 6 faces.
- Faces are rectangles (some may be squares, but typically not all).
- Opposite faces are equal, but usually has three pairs of different-sized rectangles.
- So, faces are all rectangles, but not all the same shape → ✔ matches all clues.

- F (Triangular Prism):
- 5 faces: 2 triangles and 3 rectangles.
- Only 5 faces → ✘ doesn't satisfy "6 faces".

Other shapes (A, C, E) don’t have 6 faces.

So only D fits.

✔ Answer to Riddle 2: Shape D

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✔ Final Answers:

1) Shape A (Cylinder)
2) Shape D (Rectangular Prism)

Let me know if you'd like this explained in simpler terms for a 2nd grader!