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A flashcard featuring an illustration of Intersecting Lines

Flashcard of Intersecting Lines

A flashcard featuring an illustration of Intersecting Lines

A flashcard featuring an illustration of Perpendicular Lines

Flashcard of Perpendicular Lines

A flashcard featuring an illustration of Perpendicular Lines

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the frog makes waved lines while moving through the water.

Swim Lines of Frog

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the…

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending two balls close to each other by very long cords. In consequence of their attraction, the cords will not hang parallel, but will incline towards each other as they descend...." —Quackenbos 1859

Gravity Proved by Cannon Balls

"That the cannon ball is capable of attracting as well as being attracted, may be proved by suspending…

A heraldic shield with a red (gules) surface, which is represented by the perpendicular lines, drawn from the head to the base of the shield.

Gules Shield

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

The illustration showing the centrifugal governor metal ball removed from the lathe to draw 180 degree lines. These lines are used to guide the machinists to create the balls in a lathe.

Metal Centrifugal Governor Ball Height Gage

The illustration showing the centrifugal governor metal ball removed from the lathe to draw 180 degree…

Illustration of an axis of symmetry drawn with respect to a hexagon.

Axis of Symmetry Drawn on a Hexagon

Illustration of an axis of symmetry drawn with respect to a hexagon.

Illustration of an axis of symmetry drawn with respect to a hexagon.

Axis of Symmetry Drawn on a Hexagon

Illustration of an axis of symmetry drawn with respect to a hexagon.

A horizontal line with arrows at both ends to show that it extends indefinitely.

Line, Horizontal

A horizontal line with arrows at both ends to show that it extends indefinitely.

A horizontal line with arrows at both ends to show that it extends indefinitely.

Line, Horizontal

A horizontal line with arrows at both ends to show that it extends indefinitely.

Horizontal line can be drawn left to right by holding the pencil away from the point.

Sketching Horizontal Line

Horizontal line can be drawn left to right by holding the pencil away from the point.

An illustration of a row of houses.

Houses

An illustration of a row of houses.

To tie a bowline knot, lay the end of the rope 'a' over 'b' so as to form a bight 'c'; pass the end 'a' round behind and under 'b', and through the bight; continue with 'a' to pass it under the standing part 'b', and through the bight 'c' in the opposite direction. This knot forms the best loop that will not slip.

Bowline Knot

To tie a bowline knot, lay the end of the rope 'a' over 'b' so as to form a bight 'c'; pass the end…

The most common type of knot, the overhand is made by passing one end of a line over the line and around it, then passing it through the loop.

Overhand Knot

The most common type of knot, the overhand is made by passing one end of a line over the line and around…

A reef knot is formed by taking an overhand knot and repeating the overhand knot process (pass one end of the line over the line, pass the line around, then feed the line through the loop) with the opposite end of the line (Fig. 1): if two overhand knots are made the same way, the result will be a 'granny' (Fig. 2).

Reef Knot

A reef knot is formed by taking an overhand knot and repeating the overhand knot process (pass one end…

A line angled for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Angled

A line angled for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line arched or enarched for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Arched

A line arched or enarched for dividing a field. "Escutcheons that have more than one tincture are divided…

A line bevilled for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Bevilled

A line bevilled for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line dancette for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Dancette

A line dancette for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line double arched for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Double Arched

A line double arched for dividing a field. "Escutcheons that have more than one tincture are divided…

A line dove-tailed for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Dove-Tailed

A line dove-tailed for dividing a field. "Escutcheons that have more than one tincture are divided by…

A line embattled or crenelle for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Embattled

A line embattled or crenelle for dividing a field. "Escutcheons that have more than one tincture are…

A line embattled grady or battled embattled for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Embattled Grady

A line embattled grady or battled embattled for dividing a field. "Escutcheons that have more than one…

A line engrailed for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Engrailed

A line engrailed for dividing a field. "Escutcheons that have more than one tincture are divided by…

A line escartelle for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Escartelle

A line escartelle for dividing a field. "Escutcheons that have more than one tincture are divided by…

A line indented for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Indented

A line indented for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line invected for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Invected

A line invected for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line nebule for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Nebule

A line nebule for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line nowy or franché for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Nowy

A line nowy or franché for dividing a field. "Escutcheons that have more than one tincture are…

A line potent for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Potent

A line potent for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

To find the projections of a line which joins two points, A, B given by their projections.

Line Projection

To find the projections of a line which joins two points, A, B given by their projections.

A line radient for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Radient

A line radient for dividing a field. "Escutcheons that have more than one tincture are divided by lines…

A line urdée for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Urdée

A line urdée for dividing a field. "Escutcheons that have more than one tincture are divided…

A line wavy or undé for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Wavy

A line wavy or undé for dividing a field. "Escutcheons that have more than one tincture are divided…

Line divided into proportional parts.

Line Divided Into Parts

Line divided into proportional parts.

Illustration showing a line with a midpoint drawn from a given exterior point to a given circumference.

Midpoint of Straight Line Drawn From an Exterior point to Circumference

Illustration showing a line with a midpoint drawn from a given exterior point to a given circumference.

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

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.

Illustration showing a line that moves so that its ends constantly touch two fixed lines which are perpendicular to each other. Locus of the midpoint.

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 parallel to a plane.

Projections of a Line

Projections of a line parallel to a plane.

Projections of a line perpendicular to a plane.

Projections of a Line

Projections of a line perpendicular to a plane.

Projections of a line inclined to a plane.

Projections of a Line

Projections of a line inclined to a plane.

Projections of a line inclined to both the horizontal and vertical planes will not show its true length, as represented in this drawing.

Projections of a Line

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

Projections of a line's true length by revolving horizontal projection.

Projections of a Line

Projections of a line's true length by revolving horizontal projection.

Projections of a line's true length by revolving vertical projection.

Projections of a Line

Projections of a line's true length by revolving vertical projection.

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the lines of force both inside and outside the loop, will cross the plane of the loop at right angles, and all those which cross the loop on the inside will pass through the plane in one direction...while all on the outside will return through the plane in the opposite direction." -Hawkins, 1917

Lines of Force

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the…

"Lines of force in a circular loop. If the loop pass through a piece of cardboard at right angles to its plane, and the curent flow as indicated, the dotted lines on the cardboard will represent the direction of the lines of force in the plane of the cardboard." -Hawkins, 1917

Lines of Force

"Lines of force in a circular loop. If the loop pass through a piece of cardboard at right angles to…

Illustration of intersecting lines with A being the point of intersection.

Intersecting Lines

Illustration of intersecting lines with A being the point of intersection.

Parallel lines

Parallel Lines

Parallel lines

Parallel lines

Parallel Lines

Parallel lines

Parallel lines

Parallel Lines

Parallel lines

Illustration of parallel lines.

Parallel Lines

Illustration of parallel lines.

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

Parallel Lines With Equal Segments Between

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

Illustration that shows if two parallel lines are cut by three or more transversals that pass through the same point, the corresponding segments are proportional.

Parallel Lines Cut by Transversals

Illustration that shows if two parallel lines are cut by three or more transversals that pass through…

Illustration that shows if two parallel lines are cut by three or more transversals that pass through the same point, the corresponding segments are proportional.

Parallel Lines Cut by Transversals

Illustration that shows if two parallel lines are cut by three or more transversals that pass through…

Illustration of perpendicular lines. Intersecting lines that meet at a right angle.

Perpendicular Lines

Illustration of perpendicular lines. Intersecting lines that meet at a right angle.

Illustration of perpendicular lines with the horizontal and vertical lines labeled. "A horizontal line is a line parallel to the horizon, or water level. A vertical line is a line perpendicular to a horizontal line; consequently, it has the direction of a plumb-line."

Perpendicular Lines With Horizontal and Vertical Labeled

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

Projections of a lines parallel to ground line.

Projections of a Lines

Projections of a lines parallel to ground line.

Illustration of two straight lines that can be used to find ratios.

Straight Lines to Find Ratios

Illustration of two straight lines that can be used to find ratios.

An exercise problem to create a vanishing point using lines. The line is drawn by placing a dot into the middle of the paper, then draw the lines angled into the middle. This creates an illusion that the lines are continuing for a long distance.

Vanishing Point Using Lines

An exercise problem to create a vanishing point using lines. The line is drawn by placing a dot into…

In the short story Ulysses, the king makes a demand.

I Demand Your Blood and Your Lives

In the short story Ulysses, the king makes a demand.