A rectangle and two circles
A cone with included interior is 3-dimensional. However, if you are not including the interior it is a 2-dimensional surface residing in a 3-d ambient space. If you're utilizing the common topological definition of dimension, you can derive that a cone (surface only) is 2 dimensional by looking at its open sets.
Polygons are a special type of 2-dimensional shapes.
No. A polygon is a plane figure - i.e. it is 2-dimensional A cone is a solid figure - i.e it is 3-dimensional
2 dimensional shapes
a cone
Many shapes have curves. Some curved shapes include:circle (2-dimensional)cone (3-dimensional)sphere (3-dimensional)cylinder (3-dimensional)
2 halves and a quarter
None. Edges are one lines (1-dimensional) not shapes like squares (2-dimensional).None. Edges are one lines (1-dimensional) not shapes like squares (2-dimensional).None. Edges are one lines (1-dimensional) not shapes like squares (2-dimensional).None. Edges are one lines (1-dimensional) not shapes like squares (2-dimensional).
A rectangle and two circles
Plain (2-dimensional), closed, convex shapes.Plain (2-dimensional), closed, convex shapes.Plain (2-dimensional), closed, convex shapes.Plain (2-dimensional), closed, convex shapes.
None. A polyhedron is 3 dimensional and you cannot make a 2 dimensional shape out of 3D shapes.
A cone with included interior is 3-dimensional. However, if you are not including the interior it is a 2-dimensional surface residing in a 3-d ambient space. If you're utilizing the common topological definition of dimension, you can derive that a cone (surface only) is 2 dimensional by looking at its open sets.
Polygons and 2 dimensional shapes
"2-dimensional" means "flat". Anything you can draw on paper is a 2-dimensional shape.
Polygons are a special type of 2-dimensional shapes.
No. A polygon is a plane figure - i.e. it is 2-dimensional A cone is a solid figure - i.e it is 3-dimensional