Two Thirds and Two Sixths of a Pie Fraction

A circle subdivided into two thirds and two sixths.

Two Twelfths of a Fraction Pie

Two twelfths of a circle.

A whole circle.

Coordinate Plane

A circle with part of a triangle inscribed in it. They are lying on a coordinate plane.

Sphere Cut By Plane

Diagram used to prove the theorem: "Every section of a sphere by a lane is a circle."

Polar of Point

Constructing the polar of a given point P with respect to a circle.

Prismatoid With 2 Circular Bases

An illustration of a prismatoid with 2 circular bases.

Prismatoid With 2 Circular Bases

An illustration of a prismatoid with 2 circular bases.

Prismatoid With Circular Base

An illustration of a prismatoid with circular base.

Polar Property

If the chords of a circle are drawn through a fixed point, then the points of intersection of the pairs…

Pulley

Pair of circular pulleys connected b a cord, showing the range of motion as arcs

Illustration of a cyclic quadrilateral, a quadrilateral inscribed in a circle. This can also be described…

Illustration showing that the radian is an angle that when placed at the center of a circle its sides…

Given any three circles, the common chords meet at one point.

Construction of Radii of a Circle

Illustration used to draw lines which are radii of a circle where the center is inaccessible.

Rectifying Arc Using Dividers

"In ordinary work the usual way of rectifying an arc is to step around it with the dividers, in spaces…

Sound Reflection in a Circle

"In a circle, sound is reflected from every plane surface placed around it, and hence, if the sound…

Regular Heptagon/Septagon Circumscribed about a Circle

Illustration of a regular heptagon/septagon circumscribed about a circle. This can also be described…

Illustration of ring (small circle in larger concentric circle).

Ring With Piece Cut Out

Illustration of ring (small circle in larger concentric circle) with piece cut out.

Ring Sprung Into Place

Illustration of ring (small circle in larger concentric circle) sprung into place.

Roman Mosaic Circle Pattern

Roman mosaic pattern of interlocking circles.

Wreath of roses

"Use the entire blossom mingled with buds and green leaves, all short stemmed, not longer than three…

Circular Rosette With 12 Petals

Circular rosette with 12 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 12 Petals

Circular rosette with 12 petals. It is made by rotating circles about a fixed point. The radii of the…

Circular Rosette With 16 Petals

Circular rosette with 16 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 16 Petals

Circular rosette with 16 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 24 Petals

Circular rosette with 24 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 24 Petals

Circular rosette with 24 petals. It is made by rotating circles about a fixed point. The radii of the…

Circular Rosette With 3 Petals

Circular rosette with 3 petals. It is made by rotating circles about a fixed point. The radii of the…

Circular Rosette With 32 Petals

Circular rosette with 32 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 32 Petals

Circular rosette with 32 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 4 Petals

Circular rosette with 6 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 48 Petals

Circular rosette with 48 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 6 Petals

Circular rosette with 6 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 6 Petals

Circular rosette with 6 petals. It is made by rotating circles about a fixed point. The radii of the…

Circular Rosette With 8 Petals

Circular rosette with 8 petals in a circle. It is made by rotating circles about a fixed point. The…

Circular Rosette With 8 Petals

Circular rosette with 8 petals in a circle. It is made by rotating circles about a fixed point. The…

Projection of Round Bar

Projection of a round bar.

Corner of Rounded Wall

Illustration of a wall with a rounded corner.

Screw with Lever Arm

"The power is generally applied by a wheel or a lever, and moves through the circumfrence of a circle.…

Hindley's Screw

"A screw cut on a solid, of such form that if any plane be taken through its longitudinal axis, the…

Circle with Secant

A secant is "a line which cuts a figure in any way. Specifically, in trigonometry, a line from the center…

Circle Sector

An illustration showing a circle sector with radius r, center/central angle v, and length of circle…

Circle Sector

An illustration showing a circle sector with center/central angle v and polygon angle w.

Circle Sector

An illustration showing a circle sector with height of segment h and radius r.

Semicircle

Illustration of a semicircle.

Right Angles Inscribed in Semicircle Proof

Illustration of a circle used to prove "Any angle inscribed in a semicircle is a right angle."