Figure 1
Velocities of points

Figure 3
Velocities of points and relations of vectors

Figure 4
Sum of vectors and sum of velocities

Figure 5a
Sum of velocities and sum of vectors (hidden)

Figure 5b
Sum of velocities and sum of vectors

Figure 6
Rotated vectors and velocities of endpoints

Figure 7a
Rotated velocities and vectors (hidden)

Figure 7b
Rotated velocities and vectors

Figure 8
Position of the treasure

Figure 9
Isosceles right triangles

Figure 10
Two squares on a triangle

Figure 11
Three squares on a triangle

Figure 13
Squares on quadrilateral

Figure 14
Napoleon's triangles

Figure 15
Squares on parallelogram