2 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

2 intersecting lines, one of which is vertical and one of which is horizontal. The intersection forms…

3 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

4 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

5 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

6 parallel vertical lines with arrows on both ends to show that they extend indefinitely.

Illustration to show that the bisector of one of two vertical angles bisects the other.

Illustration to show that the bisector of two pairs of vertical angles formed by two intersecting lines…

Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base,…

Vertical angles are when two angles have the same vertex, and the sides of the one are prolongations…

"A vertical conductor carrying an electric current, and surrounded by a magnetic line of force, which…

This modern French console is a vertical design of spiral curves and straight lines.

This modern French console is a vertical design of spiral curves and straight lines.

This modern French console is a vertical design of spiral curves and straight lines.

"A vertical section through the valve casing of a double-column hammer, used for heavy forge work."—Finley,…

"An ordinary vertical drilling machine, one of comparatively small size and single-geared having been…

"Around a vertical conductor carrying a heavy current, place a peice of paper and sprinkle iron filling…

A heraldic shield with a red (gules) surface, which is represented by the perpendicular lines, drawn…

A ladder is an inclined set of steps, hinged in the middle to form an inverted V, with stays to keep…

Projections of a line inclined to both the horizontal and vertical planes will not show its true length,…

Illustration of two lines intersecting at a point. This can be used to show vertical angles.

Illustration of two straight lines drawn from a point in a perpendicular to a given line, cutting off…

Illustration of perpendicular lines with the horizontal and vertical lines labeled. "A horizontal line…

"The accompanying engraving is an illustration of a new style vertical mill in which an attempt is made…

"To avoid the inconvenience of having the team travel around the mill, interfering with the passing…

"Azure, a pale or. PALE. One of the honourable ordinaries formed by two perpendicular lines drawn from…

"Firmly fasten one end of a piece of spring-brass wire, about No. 27 and about 1 m. long so that the…

Plan, front, and side views of a square pyramid after revolving pyramid through 30° with vertical…

A heraldic shield with a black surface, which is shown by the crossing horizontal and vertical lines.

Illustration to show the bisector of the vertical angle A of a triangle ABC, and the bisectors of the…

Illustration to show that the perpendicular bisector of the base of an isosceles triangle passes through…

"Direction of the needle when placed vertical next to the uniting wire." -Comstock 1850

"This machine consists of two vertical shafts, carrying radial arms. These arms pass each other in opposite…

"[This illustration] shows a third form of the wheel and axle. Here the axle A is vertical, instead…