two planes next to each other
newdiv
The Military
A Spy Plane is an example of Acute Triangle.... >> njoy
a real life example of an octagon is a stop sign.
A pennant is a real life example of an isosceles triangle.
newdiv
a piece of paper
The Military
a sheet of paper
doesn't exist in reality
A Ramp, a screw thread.
A Spy Plane is an example of Acute Triangle.... >> njoy
Real life is a real life example!
In building construction, you usually have one horizontal plane (that floors) that is intersected by a vertical plane (the walls or support beams).
a Television is a real life example of a Cube A dice is a real life example of a cube
Coplanar just means that all forces act within a single plane, rather than in three dimensions. Examples aren't really necessary -- it's really a mathematical abstraction, because in the real world forces act in three dimensions.
a real life example of an octagon is a stop sign.