A circle in a aerodynamic chamber where the airflow hitting the object. The area at point DD is large…

Aerodynamic of the ellipse where the area at point DD is small. The small area creates less resistance…

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

Illustration of circle with inscribed angle 30 and central angle 60.

"Azure, an annulet argent. Annulets are added to arms for a difference. ANNULET. A small circle borne…

Illustration showing that the arc length can be found by multiplying the angle measure by the radius…

Illustration used to show how to "find an arc of a circle having a known radius, which shall be equal…

Illustration showing arcs measured in positive and negative angles.

"Raise the arm vertically to its full extent and describe horizontal circles." — Moss, 1914

Illustration of a conical bifrustum created by three parallel planes of circles with the middle plane…

"The loaves of the ancients were generally circular, and more or less flat. The following cut represents…

This round brooch is in the shape of a circle with a half moon shape laying on the interior bottom edge…

An illustration of a vertical cross section of the spherical zones of a casting with a diameter of 16…

An illustration showing how to construct the center and radius of a circle that will tangent a given…

An illustration showing how to construct the center and radius of a circle that will tangent a given…

An illustration showing how to construct the center and radius of a circle that will tangent a given…

An illustration showing how to construct a center and radius of a circle that will tangent the three…

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

"Attach a ball, for instance, to a cord; and , fastening the end of the cord at a point, O, give a quick…

"The instant one of the strings is let go, the centrifugal force carries off the stone in a tangent…

Illustration showing a circle formed by the intersection of a plane perpendicular to the axis of the…

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

Illustration used to construct a circle when given three points.

This marble mosaic circle pattern is inlaid pieces of glass found in the windows of a cathedral in Florence,…

The marble mosaic circle pattern is inlaid pieces of stone, wood, glass, leather or straw to make a…

This Medieval Tile circle pattern is a stained glass design. It the oldest process of fitting together…

This medieval tile circle pattern is a stained glass design. It the oldest process of fitting together…

This medieval tile circle pattern is a stained glass design. It the oldest process of fitting together…

Illustration of a circle used to prove "All angles inscribed in the same segment are equal."

Illustration of a circle with an inscribed angle that can be used to prove that "An inscribed angle…

Illustration of a circle with an inscribed angle that can be used to prove that "An inscribed angle…

Illustration of a circle with an inscribed angle that can be used to prove that "An inscribed angle…

Illustration of a circle used to prove "Any angle inscribed in a segment less than a semicircle is an…

An illustration showing how to construct a circle tangent to a given line and given circle. "Add the…

An illustration showing how to construct a circle that tangents two given lines and goes through a given…

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

Illustration used to show that "If two tangents are drawn from any given point to a circle, those tangents…

Illustration used to show that "A tangent to a circle is perpendicular to the radius drawn to the point…

Illustration of circle with 10 inch diameter and square.

Design made by drawing one large circle and then three circles that are internally tangent to the original…

Design made by drawing one large circle and then three circles that are internally tangent to the original…

Circle with 36 degree angles marked. This diagram can be used with the following trig problem: Locate…

Design made by drawing one large circle and then four circles that are internally tangent to the original…

Design made by drawing one large circle and then four circles that are internally tangent to the original…

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

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