### Construction Of Dividing A Line

Illustration used to show how to divide a given straight line into required number of equal parts.

### Drawing Parallel Lines Using T-square and Triangle

Parallel lines are drawn by holding the triangle against the T-square at an angle, or another triangle,…

### Drawing Perpendicular Lines Using T-square and Triangle

Perpendicular lines are drawn by fitting the hypothenuse of the triangle to the T-square at an angle,…

### Angle of Elevation

Illustration showing an angle of elevation from a horizontal line to a line of sight.

### Tangent to an Ellipse

Diagram an ellipse with a tangent line that illustrates "A line through a point on the ellipse and bisecting…

### Line Divided Into Equal Parts

Illustration used to show how to divide a given straight line into any number of equal parts.

### Construction Of Equilateral Triangle

Illustration used to show how to draw an equilateral triangle when given one side.

### Construction Of Equilateral Triangle

Illustration used to show how to draw an equilateral triangle when given the altitude.

### Equipotential Lines

"When a charge is moved from any point to another point in the same equipotential surface, no work is…

### Horizontal Solid and Dashed Line Drawing Exercise

An exercise for mechanical drawing to construct a series of horizontal lines. The solid lines are drawn…

### Horizontal Solid Line Drawing Exercise

An exercise problem drawing a series of horizontal lines using a straight edge or triangle without using…

### Flashcard of a Line

A flashcard featuring an illustration of a Line

### Flashcard of a Line Segment

A flashcard featuring an illustration of a Line Segment

### Flashcard of a Parallel Lines

A flashcard featuring an illustration of a Parallel Lines

### Flashcard of Intersecting Lines

A flashcard featuring an illustration of Intersecting Lines

### Flashcard of Perpendicular Lines

A flashcard featuring an illustration of Perpendicular Lines

### Floor Hanger

"A shaft-bearing secured to the floor, and used for running countershafts and lines when they cannot…

### Four Person File Military Formation

An illustration of a four person file military formation.

### Metal Centrifugal Governor Ball Height Gage

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

### Axis of Symmetry Drawn on 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.

### Line, Horizontal

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.

### Segment, Horizontal Line

Illustration of a horizontal line segment. A line segment is a section of a line with definite endpoints.

### Segment, Horizontal Line

Illustration of a horizontal line segment. A line segment is a section of a line with definite endpoints.

### Segment, Horizontal Line

Illustration of a horizontal line segment. A line segment is a section of a line with definite endpoints.…

### Sketching Horizontal Line

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

### Tangent to a Hyperbola

Diagram part of a hyperbola with a tangent line that illustrates "A line through a point on the hyperbola…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

### Lines of Force under Induction

"Lines of force of a charged sphere and a conductor under induction. The negative electrification on…

### Isogonic Lines of Earth

"The magnetic poles of the earth do notc oincide with its geographical poles and, condequently, in some…

### Vertical Line of Symmetry, Isosceles Triangle With

Isosceles Triangle with a dotted vertical line that is a line of symmetry.

### Vertical Line of Symmetry, Letter A With

Letter A with a dotted vertical line that is a line of symmetry.

### Horizontal Line of Symmetry, Letter B With

Letter B with a dotted horizontal line that is a line of symmetry.

### Angle of Two Lines

To find the angle between two given lines a, b of which the projections a1, b1 and a2, b2 are given.

### Construction Of Line Equal To Arc

Illustration used to show how to find a straight line of the same length as a given arc of a circle.

Broken line

### Broken Line

Illustration of a broken line.

Curved line

### Curved Line

Illustration of a curved line.

### Line Divided Into Parts

Line divided into proportional parts.

### 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.

### 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…

### Perpendicular Line Drawn To a Given Line From an External Point

Illustration showing that the perpendicular is the shortest line that can be drawn to a straight line…

### Projection of a Line

Illustration of a line projection. If perpendiculars be drawn from the extremities of a line, as AB,…

### Projection Of A Line

Illustration of straight line AB projected upon HK.

### Projections of a Line

Projections of a line parallel to a plane.

### Projections of a Line

Projections of a line perpendicular to a plane.

### Projections of a Line

Projections of a line inclined to a plane.

### 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

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

### Projections of a Line

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