cone
A cone or a paraboloid
A solid figure that can be made with a net of 4 triangles is a tetrahedron. A tetrahedron consists of four triangular faces, which can be arranged in three-dimensional space to form a three-dimensional shape. Each triangle in the net corresponds to one face of the tetrahedron when folded together.
To determine what solid can be formed from a given net, one would typically look for the arrangement of faces, edges, and vertices indicated in the net. If the net features a specific combination of triangles and rectangles, it could represent a pyramid or a prism, depending on the arrangement. Without seeing the net, it's difficult to specify the exact solid, but common solids formed from nets include cubes, pyramids, and prisms. Identifying the base shape and the number of faces will help clarify which solid can be constructed.
That sounds like a cone. One surface is a circle and the other surface is curved.
There is no solid that has those characteristics. To have an edge it must have another surface.
A cone or a paraboloid
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An open circle should have a dashed circumference, a closed circle a solid one.
semi-circle
That sounds like a cone. One surface is a circle and the other surface is curved.
There is no solid that has those characteristics. To have an edge it must have another surface.
a cone...
Circles were drawn by ancient peoples before writing was developed. No one "invented" or "made" the circle from that perspective.
A circle comes to mind as the face of a right cylinder (which has 2 faces). The curved side is not considered a face.
a circle base with the sides rising up in a circular fashion meeting at one point
2
a coneType your answer here...