A cylinder, yep.
Actually lots of other things too, depending on what you call a single curved side. Any two (non-intersecting) planes through a sphere make a "fat cylinder." Think of others, there's more.
Soda can or cylinder
A cylinder.
The shape with two flat circular faces and one curved face is a cylinder. The two circular faces are parallel and congruent, while the curved face connects these two circles around their perimeter. This geometric figure is commonly seen in everyday objects like cans and tubes.
The top and bottom flat surfaces (the 2 circles or ellipses) and the curved surface make up the 3 surfaces.
The cylinder only has 2 faces which are flat but the sides are curved.
Soda can or cylinder
It has three shapes. Two surfaces are flat circles and one is a curved rectangle.
A cylinder.
The shape with two flat circular faces and one curved face is a cylinder. The two circular faces are parallel and congruent, while the curved face connects these two circles around their perimeter. This geometric figure is commonly seen in everyday objects like cans and tubes.
A cube has 6 flat faces
The top and bottom flat surfaces (the 2 circles or ellipses) and the curved surface make up the 3 surfaces.
The cylinder only has 2 faces which are flat but the sides are curved.
When you say "What face" did you mean "What solid" has one curved face and two other flat faces? A solid that can be imagined is a melon wedge, cut from a sphere. Two flat faces come from the two cuts with a knife, and the one curved face that formed the rind. If you did not mean "What solid" then that makes your question unclear. I cannot imagine a face made from three other faces. Perhaps a face made from three other lines with one of them curved? It would seem you used a word wrong somewhere in your original question.
That's a Sphere not Cylinder cuz it had flat Circles Above and
A face, of a solid object, is a flat surface. If it is curved it is called a curved surface though sometimes it is also referred to as a face. Two faces meet at an edge, which is a line which may be straight or curved. Three or more faces meet at a point which is a vertex.
A cuboid has 6 flat faces but no curved surfaces. ..________ ./............../| /_______/.| |..............|.| |..............|./ |_______|/
A prism has no curved surfaces. It has 5 or more flat faces.