3D - The real dimensions
- Line parallel to a plane
- Line perpendicular to a plane
- Perpendicular planes
- Determination of angle between 2 planes
- Mediator plane
- Axis of a circle
- Bisector plane
Line Parallel to A Plane
How to prove?
Prove the line is parallel to a line in the plane.
Line Perpendicular to a Plane
Determination of angle between 2 intersecting planes
2. Select a straight line in first plane perpendicular to the common line.
3. Select a straight line in second plane perpendicular to common line.
The angle in that between the first determined straight line and the second.
A mediator plane is a plane perpendicular to a segment at its midpoint.
Any point on the mediator plane is equidistant to the extremities of the segment.
How to prove it?
M1: Prove 3 points on the plane equidistant to the extremities of the segment.
M2: 1) D*[AB]
2) DA=DB, OA=OB, CA=CB
3) (DOC) mediator plane