### Golden Angle

Illustration showing the golden angle. The golden angle is the smaller of two angles created by dividing…

### Arc lamp

"In all the arc lamps in common use, the coil, by means of which the automatic maintenance of the arc…

### Arc Lamp

"The arc lamp is essentially a device for automatically separating the carbons when the current is turned…

### Carbon Flame Arc Lamp

"Diagram of inclined carbon-flame arc lamp." —Croft 1917

### Detailed Arc Lamp

"Illustration showing the detail of a carbon arc lamp; S, solenoid; c, clutch; w, clutch-washer; T,…

### Differential Arc Lamp

"Differential arc lamp mechanism." —Croft 1917

### Metallic Flame Arc Lamp

"Metallic flame arc lamp." —Croft 1917

### Arc Lamps In Series

"Since arc lamps are connected in series, any particular lamp that is to be extinguished must be short-circuited.…

### Circuits of Arc Lamp

"Circuits of a series arc lamp." —Croft 1917

### Arc Lamp Series Regulating Coil

"Arc lamp mechanism with series regulating coil." —Croft 1917

### Arc Lamp with Shunt Regulating Coil

"Arc lamp mechanism with shunt regulating coil." —Croft 1917

### Carbon Arc Lighting

Arc lighting, which used two carbon rods conducting electricity to produce light. -Atkinson 1903

### Bisecting an Arc

Illustration used to show how to bisect a given arc.

### Positive and Negative Arcs in Circles

Illustration showing arcs measured in positive and negative angles.

### Bisect A Line

Method to draw the bisector of a line

### Bisect An Angle

Method to bisect an angle

### Construction Of Center

Illustration used to show how to find the center when given an arc and its radius.

### Construction Of A Circle Arc

An illustration showing how to construct a circle arc without recourse to its center, but its chord…

### Arc of Circle

Illustration of a circle with the arc aeb drawn and labeled.

### Arc of Circle

An illustration of an arc of a circle. An arc is any part of the circumference of a circle.

### Circle with Arc, Chord, Inscribed Angle, Circumscribed Polygon

Illustrations of a circle with arc, chord, inscribed angle, and circumscribed about a polygon.

### Arc and Chord in Circle

Illustration of circle with arc and chord.

### Arcs Inscribed In A Circle

A design created by inscribing 4 congruent tangent arcs in a circle.

### Central Angles and Arcs in a Circle

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

### Central Angles and Arcs in a Circle

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

### Central Angles and Arcs in a Circle

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

### Diameter Perpendicular to a Chord in a Circle

Illustration used to show that "The diameter perpendicular to a chord bisects the chord and also its…

### Circle With Parts

Circle with diameter, radius, arc, chord, and arc.

### Parts of Circle

Illustration of circle with arc, chord, diameter and radius.

### Quadrant of Circle With 60 degree Arc

Illustration of circle with quadrant and 60 degree arc.

### Radius, Diameter, and Chord In A Circle

An illustration showing a circle with radius r, diameter d, and chord c.

### Reflected Arcs Of A Circle

A design created by dividing a circle into 4 equal arcs and reflecting each arc toward the center of…

### Sector Of Circle

Illustration of a sector of a circle. A sector is the space between an arc and two radii drawn to the…

### Sector Of A Hollow Circle

Illustration of a sector of a hollow circle. A sector is the space between an arc and two radii drawn…

### Circle With Two Intersecting Chords

Illustration of a circle with two intersecting chords within the circumference. The angle formed is…

### Equal Chords in Equal Circles Theorem

Illustration used to show that "In equal circles, or in the same circle, if two chords are equal, they…

### Equal Chords in Equal Circles Theorem

Illustration used to show that "In equal circles, or in the same circle, if two chords are equal, they…

### Unequal Chords in Circles Theorem

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

### Unequal Chords in Equal Circles Theorem

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

### Unequal Chords in Equal Circles Theorem

Illustration used to show that "In equal circles, or in the same circle, if two chords are unequal,…

### Equal Circles With Intercepted Arcs

Illustration of equal circles to show that two central angles have the same ratio as their intercepted…

### Circles With Inscribed Angles

Illustration of equal circles to show that an inscribed angle is measured by half the arc intercepted…

### Intersecting Lines in Circles

Illustration showing various circles and the angles formed by intersecting lines.

### Circles With Parallels Intercepting Equal Arcs

Illustration of a circle with parallels intercepting equal arcs on a circumference.

### Reflected Arcs Of 2 Circles In A Circle

A design created by dividing a circle into 4 equal arcs and creating a reflection of each arc toward…

### Reflected Arcs Of 2 Circles

A design created by dividing a circle into 4 equal arcs and reflecting each arc toward the center of…

### Reflected Arcs Of 2 Circles

A design created by dividing a circle into 4 equal arcs and reflecting each arc toward the center of…

### Reflected Arcs Of 4 Circles In A Circle

A design created by dividing a circle into 4 equal arcs and creating a reflection of each arc toward…

### Reflected Arcs Of 4 Circles In A Circle

A design created by dividing a circle into 4 equal arcs and creating a reflection of each arc toward…

### Reflected Arcs Of 8 Circles In A Circle

A design created by dividing a circle into 4 equal arcs and creating a reflection of each arc toward…

### Reflected Arcs Of 8 Circles

A design created by dividing a circle into 4 equal arcs and creating a reflection of each arc toward…

### Draw Circular Arc Through Three Given Points

"Join AB and BC, bisect AB and BC by perpendiculars. Their intersection will be the center of the required…

### Condensing Apparatus

"Condensing Apparatus for Steamer's Side Lights.—By means of this application of the condensing…

### Condensing Apparatus

"Condensing Apparatus for Steamer's Side Lights.—By means of this application of the condensing…

### Parallel Connection

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

### Construct Equilateral Triangle

Method to construct an equilateral triangle

### Construct Isosceles Triangle

Method to construct an isosceles triangle

### Construction of Arc When Given the Chord and Height of the Segment

Illustration of of construction of an arc when the chord and height of the segment are given.

### Construction of Bisecting a Given Arc

Illustration of the construction used to bisect a given arc.

### Cycloidal Arch

"Cycloidal Arch. Elliptical Arch."-Whitney, 1902