GEOMETRY, 2008
Minimum three noncollinear points are required to form a plane.
Observe the figure; consider any three noncollinear points of the figure to name the plane. Total five planes (four side planes and one base plane) are shown in the figure and they are:
1. Plane ABC
2. Plane BCE
3. Plane ADE
4. Plane CDE
5. Plane ABE
Five planes are there in the figure.
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