### Identifying the 20-Sided 3D Shape

1. **Understanding the Options**:
- **Pentagonal Trapezohedron**: A polyhedron with faces that are trapezoids and a total of 20 faces.
- **Pentadecagon**: A 2-dimensional shape with 15 sides, not applicable here.
- **Icosahedron**: A polyhedron with 20 triangular faces.
- **Cube**: A polyhedron with 6 square faces, not related to a 20-sided shape.

2. **Analysis of Options**:
- The only option that explicitly refers to a shape with 20 faces in a three-dimensional context is the **Icosahedron**.
- Although the **Pentagonal Trapezohedron** also features 20 faces, it is primarily considered less common compared to the icosahedron, which is more widely recognized.

### Final Answer
The correct answer is **Icosahedron**.

Question

### Identifying the 20-Sided 3D Shape

1. **Understanding the Options**:
   - **Pentagonal Trapezohedron**: A polyhedron with faces that are trapezoids and a total of 20 faces.
   - **Pentadecagon**: A 2-dimensional shape with 15 sides, not applicable here.
   - **Icosahedron**: A polyhedron with 20 triangular faces.
   - **Cube**: A polyhedron with 6 square faces, not related to a 20-sided shape.

2. **Analysis of Options**:
   - The only option that explicitly refers to a shape with 20 faces in a three-dimensional context is the **Icosahedron**. 
   - Although the **Pentagonal Trapezohedron** also features 20 faces, it is primarily considered less common compared to the icosahedron, which is more widely recognized.

### Final Answer
The correct answer is **Icosahedron**.

Knowee AI · Accepted Answer

### Identifying the 20-Sided 3D Shape

1. **Understanding the Options**:
   - **Pentagonal Trapezohedron**: A polyhedron with faces that are trapezoids and a total of 20 faces.
   - **Pentadecagon**: A 2-dimensional shape with 15 sides, not applicable here.
   - **Icosahedron**: A polyhedron with 20 triangular faces.
   - **Cube**: A polyhedron with 6 square faces, not related to a 20-sided shape.

2. **Analysis of Options**:
   - The only option that explicitly refers to a shape with 20 faces in a three-dimensional context is the **Icosahedron**. 
   - Although the **Pentagonal Trapezohedron** also features 20 faces, it is primarily considered less common compared to the icosahedron, which is more widely recognized.

### Final Answer
The correct answer is **Icosahedron**.

What is a 20-sided 3D shape called?Pentagonal trapezohedronPentadecagonIcosahedronCube

Question

What is a 20-sided 3D shape called?

Solution

Identifying the 20-Sided 3D Shape

Final Answer

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