Episode 15 – Cross sections of a tetrahedron European section – Season 2

Rule 3 : When a line of the setion plane is in a fae, you an build its intersetion with. an edge of

Rule 2 : When a line of the section plane is in a face, and a third point is on a face with an edge in common, you can draw the intersection of the line with the common edge..

To find the coordinates of the intersection of a plane with a line (if it exists), just solve the system made of a cartesian equation of the plane and a set of parametric equations

Leonhard Euler (1707 – 1783) Königsberg Castle before WWI. Episode 19 –

Erdös asks us to imagine an alien force, vastly more powerful than us, landing on Earth and demanding the value of R (5, 5) or they will destroy our planet. In that case, he claims,

Planar and plane graphs.. Plane

5 Set the unvisited vertex with the smallest distance (from the initial node) as the next current vertex and continue from

Addition and multiplication in the set Z [i ] follow the same rules as addition and multiplication of integers but “real parts” and “imaginary parts” cannot be mixed up