1. The problem asks which 3-dimensional figure has a triangular face. 2. Let's analyze each option: - Rectangular pyramid: Has a rectangular base and triangular faces. - Sphere: Has no faces, only a curved surface. - Cylinder: Has two circular faces and one curved surface. - Cube: Has six square faces. 3. Since the figure has a triangular face, the only option that fits is the rectangular pyramid. Final answer: Rectangular pyramid