### Segments, 2 Parallel Line

2 parallel horizontal line segments.

### Segments, 2 Parallel Line

2 slanted parallel line segments.

### Segments, 2 Parallel Line

2 slanted parallel line segments.

### Segments, 3 Parallel Line

3 parallel horizontal line segments.

### Segments, 4 Parallel Line

4 parallel horizontal line segments.

### Transversal, 4 Parallel Lines Cut By A

4 parallel lines cut by a 5th line known as the transversal.

### Segments, 5 Parallel Line

5 parallel horizontal line segments.

### Segments, 6 Parallel Line

6 parallel horizontal line segments.

### Segments, 6 Parallel Line

6 slanted parallel line segments.

### Segments, 6 Parallel Line

6 slanted parallel line segments.

### Angle Bisector Drawn Parallel to A Side

Illustration to show that if through any point in the bisector of an angle a line is drawn parallel…

### Two Intersecting Circles With Lines

Illustration showing 2 intersecting circles with a line drawn through each point of intersection terminated…

### Tangent Circles With Chords

Illustration showing 2 circles with that touch each other and two lines drawn through the point of contact…

### Cone

"If a cone be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

### Parallel Connection

"When all of the positive plates are connected on one side, and all of the negative plates are connected…

### Construction of a Circle Through a Given Point that Cuts Chords of Given Lengths From Parallels

Illustration used to construct a circle that shall pass through a given point and cut chords of a given…

### Parallel Tangents to an Ellipse

Illustration showing that tangents drawn at the ends of any diameter are parallel to each other.

### Ellipsoid

Each section is an ellipse. The surface is generated by an ellipse moving parallel to itself along two…

### Flashcard of a Parallel Lines

A flashcard featuring an illustration of a Parallel Lines

### Flashcard of a Parallelogram

A flashcard featuring an illustration of a Parallelogram

### Inclined Plane with the Force Acting Parallel to the Base

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

### Inclined Plane with the Force Acting Parallel to the Plane

"An inclined plane is a slope, or flat surface, making an angle with a horizontal line...the force acts…

### Parallel Fret Band

The parallel fret band is a pattern that is parallel in perspective that was found in a Roman mosaic…

### Gauntlet Track

"In railway engineering, the running together of parallel tracks into the space occupied by one, by…

### Hand-Vice

"Hand-vices are used in the manner implied by their name, without being attached to a bench like the…

### Straight Line Moving to Two circles

Illustration showing a line that remains parallel to a given line, and touches at one end a given circumference.

### Circle Made by Ends of a Line Touching Two Fixed Lines Perpendicular to Each Other

Illustration showing a line that moves so that its ends constantly touch two fixed lines which are perpendicular…

### Projections of a Line

Projections of a line parallel to a plane.

### Parallel Lines

Illustration showing two straight lines in the same plane perpendicular to the same straight line are…

### Parallel Lines

Illustration showing if a straight line is perpendicular to one of two parallel lines, it is perpendicular…

### Parallel Lines With Equal Segments Between

Illustration of two parallel lines with equal segments between them. Two parallel lines are everywhere…

### Projections of a Lines

Projections of a lines parallel to ground line.

### Parallel Lines Cut By A Transversal

Illustration showing that when three or more parallel lines intercept equal parts on one transversal,…

### Parallel Lines Cut By A Transversal

Illustration showing that if two parallel lines are cut by a transversal, then the alternate interior…

### Parallel Lines Cut By A Transversal

Illustration showing that when two straight lines in the same plane are cut by a transversal, if the…

### Parallel Lines Cut By A Transversal

Illustration showing that when two parallel lines are cut by a transversal, the exterior-interior angles…

### Parallel Lines Cut By A Transversal

Illustration showing that when two parallel lines are cut by a transversal, the two interior angles…

### Micrometer

"a is the sphere, placed in half-holes on the axis bb, so that when its principal axis is parallel to…

### Micrometer

"a is the sphere, placed in half-holes on the axis bb, so that when its principal axis is parallel to…

### Convergent Rays in a Concave Mirror

"Thus, were the rays falling on the mirror parallel, the focus would be at a' but in consequence of…

### Plane Inclined Mirrors

"The incident rays, a and b, being parallel before they reach the reflectors, are thrown off at unequal…

### Parabola Second Method

Draftsman's second method for drawing a parabola

### Tangents to a Parabola

Illustration showing that if two tangents RP and RQ are drawn from a point R to a parabola, the line…

### Parallel Connection

"Diagram of a multiple or parallel connection. When connected in this manner the voltage of the battery…

### Parallel Connection

Figure showing battery cells connected in parallel, with all of the positive ends wired together, and…

### Parallel Lines Cut By a Perpendicular And Transversal

Illustration showing two parallel vertical lines cut by a perpendicular line and a transversal. Congruent…

### Parallel Motion

"Its mechanism may be understood by the means of the subjoined figure, B represents the end of the beam,…

### Parallel Planes

To draw a plane through a given point parallel to a given plane.

### Parallel Vice

"The English parallel vice is little used except for small work." — Encyclopedia Britannica, 1893

### Equal and Parallel Opposite Faces of a Parallelopiped

Diagram used to prove the theorem: "The opposite faces of a parallelopiped are equal and parallel."

### Parallelopipedon

"A parallelopipedon is a prism whose bases (ends) are parallelograms." —Hallock 1905

### Relationship Between 2 Parallelopipeds With Equal Altitudes

Diagram used to prove the theorem: "The rectangular parallelopipeds which have two dimensions in common…

### Relationship Between Dimensions of Parallelopipeds

Diagram used to prove the theorem: "The rectangular parallelopipeds are to each other as the product…

### Lines Perpendicular To A Plane

"If one of two parallels is perpendicular to a plane, the other is also."

### Plane Determined by 2 Parallel Lines

Illustration of a plane determined by 2 parallel lines

### Lines Perpendicular to Plane

Two straight lines, AB and CD, perpendicular to the same plane (MN) are parallel.

### Intersecting Planes

Two intersecting planes on a third plane. "If two intersecting planes are each perpendicular to a third…

### Pulley

Two arrangements of pulley: crossed belt and uncrossed belt. The pulleys are constructed with two circles…

### Pyramid

"If a pyramid be cut by a plane, parallel to the base, so as to form two parts, the lower part is called…

### Divergent Rays

"From the surface of a plane mirror, parallel rays are reflected parallel; but the convex mirror causes…