They can be any figure
In analytical geometry, you equate the equations of the two planes and simplify.
The intersection of two planes is one straight line.
Well...... Actually, planes would be considered triangles in geometry because triangles are triangles.
points, lines and planes. points are always represented by a dot lines has extend in both direction and planes extend in all direction. this is true !
Geometry
Geometry is all about the study of angles, lines, planes, and shapes
Point, line and plane ARE terms from geometry.
Euclidean Geometry
faces in geometry normally means planes or the surfaces of the structure referred. for example : a cube has six faces since externally 6 surfaces or planes can be seen .
points,lines,and planes
Coordinated geometry
In geometry, two planes intersect in a line. The only time this is not true is if the two planes are parallel to each other.