"Diagram of a series multiple connction. Two sets of cells are connected in series, and the two batteries…

The lines of contact are equal, but the axes are neither parallel to each other, or the line of contact.

Illustration showing a square with diagonals, lines, and parallel lines

Illustration of two straight lines, AB and CD, cut by a transversal EF.

Illustration of a triangle showing that when a line parallel to the base of a triangle bisects one side,…

Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point…

Diagram used to prove the theorem: "The plane passed through two diagonally opposite edges of a parallelopiped…