cone
It Is A Cone
a cone
A cone or a bulged-out cone.
perimeter is when you have a shape and then you have your area and that is what is in the middle of the shape and perimeter is the edge of the shape.
a circle ??
semi circle
A cone
A cone, a sliced ellipsoid (including sphere) are two possibilities. There are others.
A circle
An ellipse.
A circle, ellipse or similar shape.
The Cone
A Cone
A cone
cone
A cone has one vertex and one edge.