A triangle.
Decagon, if a plane figure or decahedron, if a solid.
plane figure
An 11-sided figure is a hendecagon, or an undecagon. Either name applies.
A Dodecahedron has twelve pentagonal faces. A Dodecagon is a plane figure with twelve sides.
hendecagon that's it! sincerly yours, cheycee
A triangle.
An ellipse.
Decagon, if a plane figure or decahedron, if a solid.
plane figure
An 11-sided figure is a hendecagon, or an undecagon. Either name applies.
Area of plane figure
No it is not a plane but it is a solidfigure
A Dodecahedron has twelve pentagonal faces. A Dodecagon is a plane figure with twelve sides.
It is a figure that is the same as another figure in the plane. A square is the same plane figure as another square, but a cube is same the same plane figure even tho it is made up of 6 squares.
Circle.
the plane figure has 2 dimension and spatial figure has 3 dimension