Name the shapes
with no edges.
Sphere is the shape with no edges. A sphere has a completely curved surface with no straight or curved edges.
with only flat faces.
Cube and Cuboid are shapes with only flat faces. All six faces of these shapes are flat surfaces.
with only curved faces.
Sphere is the shape with only curved faces. A sphere has one continuous curved surface with no flat faces.
with both straight and curved edges.
Cylinder and Cone have both straight and curved edges. Cylinders have curved edges around their circular faces. Cones have a curved edge around their circular base.
with both flat and curved faces.
Cylinder and Cone have both flat and curved faces. Cylinders have 2 flat circular faces and 1 curved face. Cones have 1 flat circular face and 1 curved face.
Explanation
(i) A sphere is perfectly round with no edges or corners. Examples include balls and marbles. (ii) Cubes have 6 flat square faces. Cuboids have 6 flat rectangular faces. Neither has any curved surfaces. (iii) A sphere has no flat faces - its entire surface is curved like a ball. (iv) Cylinders have curved edges around their top and bottom circular faces. Cones have a curved edge around their circular base. Both shapes combine flat and curved surfaces. (v) Both cylinders and cones combine flat circular faces with curved surfaces. This distinguishes them from shapes with only flat faces (cube, cuboid) or only curved faces (sphere).