Coordinate geometry or Analytic geometry

Points, Lines and Planes in Three-Dimensional (3D) Space
Position of two lines in a three-dimensional space

Line and plane in a three-dimensional space
Two planes in a three-dimensional space
The line of intersection of two planes

Orthogonal projection of a point onto a plane
The distance from a point to a plane
Angle between a line and a plane, and angle between two planes
Plane Analytic Geometry
Coordinate plane, points, line segments and lines

Area of a triangle
The coordinates of the centroid of a triangle

Slope-intercept form of a line,  y = mx + c
Slope or gradient, y-intercept and x-intecept
The intercept form of the equation of the line
Lines parallel to the coordinate axes, horizontal and vertical lines
The point slope form of the equation of a line
The two point form of the equation of a line
The parametric equations of a line
Parallel and perpendicular lines
Hessian normal form of the equation of a line
Distance between a point and a line
Lines and points relations, examples
 Points, Lines and Planes in Three-dimensional Coordinate System Represented by Vectors
Equations of a line in space

Orthogonal projection of a line in space onto the xy coordinate plane
A line in a 3D space examples

A plane in a 3D coordinate system, examples

Through a given point pass a line perpendicular to a given plane

Projection of a point onto a plane

Plane laid through a given point, such that be parallel with two skew lines, example
Plane laid through a given point, such that be parallel with two parallel lines, example

Distance between point and plane, example
Distance between parallel lines, example
Distance between two skew lines, example