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With great difficulty because a cone is a 3D object and only 2D shapes have perimeters
No because 2d shapes are plane such as polygons but example of 3d shapes are: pyramid, cone, cuboid, cylinder, sphere ... etc
It is a trapezoid which is a 2D shape whereas the rest are 3D shapes.
what are the 2d shapes of the real world
this is the shape of 2d cone