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a surface that does not move
A 2D interior will be length times width (a flat shape) as in the area of a floor.A 3D figure would be length times width times depth (a raised shape) as in a box.The units used would depend. A floor would be in feet and inches or metres and centimetres.A 3D figure would be in a similar measurement, but given in cubic units.
A cone would fit the given description
Its base is a flat surface
A mirror with a flat surface - planar
a surface that does not move
an inclined plane
what is the name of an flat surthis
A raised panel door has a rim, then an indentation and the panel inside it is raised to the level of the rim. A flat panel door is more like a picture frame where the rim is raised and the panel inside it is indented.
That sounds like a ramp to me.
A cone would fit the given description
A 2D interior will be length times width (a flat shape) as in the area of a floor.A 3D figure would be length times width times depth (a raised shape) as in a box.The units used would depend. A floor would be in feet and inches or metres and centimetres.A 3D figure would be in a similar measurement, but given in cubic units.
craters
I think you mean a plateau. Plateau: expanse of raised land with a level surface. Also known as tableland, do to the flat tops.
Slip-On Flat Face Flange. It means the face of the flange, the surface the physically touches the next flange is flat as opposed to raised (SORF Flange)
Topography refers to the surface features of a place or region.
A maria