There seem to be lots of answers to this question, all saying cone.
What about the poor lonely sphere? Split it in two by anyintersection with a plane and each piece will fit the question.
a cone...
An empty cone (like an ice-cream cone) doesn't have any flat surfaces. It has two curved surfaces, one outside and one inside. A solid cone has a flat base, and one other curved surface.
The term diameter, relative to a circle, is the width. For a sphere, such as a planet, the distance from the surface to the center is actually the radius, which is one-half of the diameter.For a cylinder, it depends on the orientation. If you have a can and it is right-side up, then the diameter is not the depth -- it's just the distance from one side of the top "circle" to the other, passing through the center. If you put the can on its side, then the diameter could become the "depth." But this terminology is normally not used for curved geometric solids.
Perimeter is the distance around something. In the case of a circle (or other curved figures), this is simply called the perimeter, so I would say perimeter is the same as circumference. Except that it is uncommon to call the circumference of a circle the "perimeter".
Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.Most triangles, quadrilaterals, and other polygons with five or more sides; most closed shapes with curved sides.
a coneType your answer here...
a cone...
Cone
That sounds like a cone. One surface is a circle and the other surface is curved.
I may be the upper or lower half of any oblate or prolate spheroid.You'll never know.bwahahaha
A cross section of an ellipsoid or sphere. A cone. A [right] truncated paraboloid (like the reflector of a car headlight). There are several others.
A riddle is: I am a polyhedron I have two surfaces one of my surfaces is formed by a circle the other face is curved what am I?
All geometric shapes can be inscribed in a circle, since the circle is bigger than the other geometric shape inscribed in it. (Obviously)
a circle has no face a sphere on the other hand does
If you're talking about the 4th grade Study Link 11.3 "Geometry Riddles" these are the answers: 1. I am a geometric solid. I have two surfaces. One of my surfaces is formed by a circle. The other surface is curved. What am I? Answer: Cone 2. I am a geometric solid. I have one square base. I have four triangular faces. Some Egyptian pharaohs were buried in tombs shaped like me. What am I? Answer: Square Pyramid 3. I am a polyhedron...( it's taking to long to type I'm going to just right the answers now) Answer: Hexagonal Prism 4. Answer: Octahedron Umm... those are the answers...bye!
a straight line and a circle
An empty cone (like an ice-cream cone) doesn't have any flat surfaces. It has two curved surfaces, one outside and one inside. A solid cone has a flat base, and one other curved surface.