picture plane An imaginary flat surface that is assumed to be identical to the surface of a painting. Forms in a painting meant to be perceived in deep three-dimensional space are said to be "behind" the picture plane. The picture plane is commonly associated with the foreground of a painting.
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It is any plane shape which is enclosed by 12 straight sides.
The answer will depend on the angle formed between the plane and the axis of the cone. Since there is no picture "below" it is not possible to determine that and therefore it is impossible to give an answer.
No, because this browser is rubbish. But it is closed plane (flat) shape bounded by four straight lines.
TWO SHAPES THAT ARE THE SAME SIZE AND SAME SHAPE ARE CONGRUENT. THEY CAN BE TURNED OR ROTATED ANY DIRECTION. POLYGONS AND ANY OTHER SHAPES CAN BE CONGRUENT. LOOK AROUND YOU, YOU'LL FIND MANY CONGRUENT FIGURES. PLANE FIGURES HAVE TO BE ON PAPER OR A FLAT AREA LIKE A PICTURE. THEY ARE TWO DIMENSIONAL. :)
A plane intersects a line at a point, and i plane intersects another plane at a line.