A sphere, ellipsoid, torus (doughnut), blob - lumpy but with no sharp edges - are some examples.
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a triangular pyramid
a cylinder
A 1 dimensional shape is a line.
A right-angle triangle.
none unless u consider a circle has a face * * * * * In fact, any two dimensional closed figure: triangle, quadrilateral, other polygons, circle, ellipse, wriggly loop all have 1 flat face.