# الهندسة الفراغية – لغات

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### Unit 1: Geometry and Measurement in 2D and 3D

1
The 3D orthogonal coordinate system
2
*quiz* The 3D orthogonal coordinate system
1 question
3
The distance between two points in space
4
Equation of sphere in space
5
Vectors in space
6
Adding vectors in 3D
7
Multiplying a vector by a scalar
8
Directed angels of vectors
9
Scalar product of two vectors
10
cross product of two vectors
11
Vector projections
12
Scalar triple product

### Unit 2: Straight Lines and Planes in Space

1
Direction vector of straight line
2
Vector equation of straight line in space
3
Cartesian equation of straight line
4
parametric equation of straight line
5
parallel , intersecting , and skew lines
6
The angle between two lines in space
7
Distance between line and point in space
8
The vector equation of plane
9
The standard equation of plane
10
general form of equation of plane
11
Equation of line of intersection of two planes
12
Distance between parallel planes