 ### 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…