 ### Golden Angle

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

This image of a giant Brazilian Tree shows about fifteen men with arms outstretched are needed to embrace… ### Construction Of A Center And Radius Of A Circle That Will Tangent A Given Circle And Line

An illustration showing how to construct the center and radius of a circle that will tangent a given… ### Construction Of A Center And Radius Of A Circle That Will Tangent A Given Circle And Line

An illustration showing how to construct the center and radius of a circle that will tangent a given… ### Construction Of A Center And Radius Of A Circle That Will Tangent A Given Circle

An illustration showing how to construct the center and radius of a circle that will tangent a given… ### Construction Of The Center And Radius Of A Circle Tangent To Triangle Sides

An illustration showing how to construct a center and radius of a circle that will tangent the three… ### Construction Of A Circle Arc

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

A circle with labels for radius, diameter, and circumference. The visual will help to remember what… ### Construction Of A Circle Tangent To A Line And A Circle

An illustration showing how to construct a circle tangent to a given line and given circle. "Add the… ### Construction Of A Circle That Tangents 2 Given Lines And Goes Through A Given Point

An illustration showing how to construct a circle that tangents two given lines and goes through a given… ### Construction Of A Circle That Tangents 2 Given Lines

An illustration showing how to construct a circle that tangents two given lines inclined to one another… ### Arc of Circle

An illustration of an arc of a circle. An arc is any part of the circumference of a circle. ### Circle With Circumference Through Three Points

Illustration of a circle which illustrates that through three points not in a straight line one circumference,… ### Triangles Making Up A Circle

Illustration showing that a circle may be considered as made up of triangles whose bases form the circumference. ### Circle With a Right Triangle

Illustration where one leg of a right triangle is the diameter of a circle. The tangent at the point… ### Circle With a Tangent Line and Chord

Illustration showing that from any point in the circumference of a circle, a chord and a tangent are… ### Circumferences of 2 Circles

Illustration used to prove "If two circumferences meet at a point which is not on their line of centers,… ### Circles With Parallels Intercepting Equal Arcs

Illustration of a circle with parallels intercepting equal arcs on a circumference. ### Construction of Radius When Given Only a Part of the Circumference

Illustration of of construction of a radius when given only a part of the circumference. ### Construction of Radius When Given Only a Part of the Circumference

Illustration of of construction of a radius when given only a part of the circumference. ### Cycloid

"A cycloid is the curve generated by the motion of a point on the circumference of a circle rolled along… ### Construction Of A Cyma

An illustration showing how to construct a cyma, or two circle arcs that will tangent themselves, and… ### Epicycloid

"In geometry, a curve generated by the motion of a point on the circumference of a circle which rolls… ### Epicycloid and Hypocycloid

Epicycloid is generated by a circle rolled outside of another circle, whereas a hypocycloid is circle… ### Epicycloidal Wheel

"Epicycloidal wheel, a wheel or ring fixed to a framework, toothed on its inner side, and having in… ### Construction Of An Equilateral Triangle Inscribed In A Circle

An illustration showing how to construct an equilateral triangle inscribed in a circle. "With the radius… ### Construction Of A Hexagon In A Circle

An illustration showing how to construct a hexagon in a given circle. "The radius of the circle is equal… ### 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. ### Construction Of A Pentagon Inscribed In A Circle

An illustration showing how to construct a pentagon inscribed in a circle. "Draw the diameter AB, and… ### Construction Of A Pentagon On A Line

An illustration showing how to construct a pentagon on a given line. "From B erect BC perpendicular… ### Circumference of a Circle of a Sphere

Diagram used to prove the theorem: "All points in the circumference of a circle of a sphere are equally… ### Square And Circle

An illustration used to "square a circumference". ### Construction Of A Square Circumscribed About A Circle

An illustration showing how to construct a square circumscribed about a circle. "Draw the diameters… ### Construction Of A Square Inscribed In A Circle

An illustration showing how to construct a square inscribed in a circle. "Draw the diameter AB, and… ### System of Wheels

"System of Wheels.—As the wheel and axle is only a modification of the simple lever, so a system… ### Construction Of A Talon

An illustration showing how to construct a talon, or two circle arcs that will tangent themselves, and… ### Construction Of Tangent Between 2 Circles

An illustration showing how to construct a tangent between 2 given circles. "Join the centers C and… ### Construction Of Tangent To 2 Circles

An illustration showing how to construct a tangent to 2 given circles of different diameters. "Join… ### Construction Of Circle Tangent To 2 Circles

An illustration showing how to construct a tangent circle to 2 given circles. "Join centers C and c… ### Construction Of Tangent To Circle

An illustration showing how to construct a tangent to a circle through a given point in a circumference.… ### Construction Of Tangent To Circle

An illustration showing how to construct a tangent to a circle through a given point outside of a circumference.… ### Construction Of Circle Tangent To Circle

An illustration showing how to construct a tangent circle to a circle with a given radius. "Through… ### Right Triangle Inscribed in Semicircle Shows Mean Proportional

Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in… ### Construction Of Two Circles That Tangent Themselves and 2 Given Lines

An illustration showing how to construct two circles that tangent themselves and two given lines. "Draw…