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

Illustration showing a circle with a diameter, radius, and segment drawn.

Illustration showing a circle with a diameter, radius, lines, triangle, and segment drawn.

Illustration showing the diameter of a circle inscribed in a right triangle is equal to the difference…

Illustration of circle with sector and segment used to find area.

Illustration of partial circle with sector and segment used to find area.

Illustration of circle with diameter and segment used to find area.

Illustrations of a circle with segment, semicircle, sector, quadrant, and central angles drawn.

Illustration showing a circle with various chords and tangents drawn.

Illustration showing a circle with various chords and tangents drawn.

Illustration where one leg of a right triangle is the diameter of a circle. The tangent at the point…

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

Illustration showing 2 intersecting circles with a line drawn through each point of intersection terminated…

Illustration showing 2 intersecting circles with a lines drawn that form a triangle.

Illustration showing 2 circles with that touch each other and two lines drawn through the point of contact…

Three dimensional representation of the intersecting planes required to create the conic sections hyperbola,…

Illustration used to construct a circle that shall pass through a given point and cut chords of a given…

Illustration of the construction used upon a given straight line, to describe a segment of a circle…

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

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

Gepyrea is a name formerly given to a class of worms which included three families: (1) Priapulidae;…

An illustration of a straight line with 5 points dividing it into 4 equal parts. Multiple of a given…

Illustration showing two straight lines drawn from the same point in a perpendicular to a given line,…

Illustration of two parallel lines with equal segments between them. Two parallel lines are everywhere…

The segments between the point of intersection of two tangents to a conic and their points of contact…

"Comparison of the sixth prosomatic limb of a recent scorpion (B), of Palaeophonus (C), and of Limulus…

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

Illustrations of a segment, a ray, and a line that can be used when providing definitions.

"The Flanch is formed of a segment of a circle placed on the side of the shield. It is always borne…

An 8-inch sphere cut by parallel planes, one 2 inches from center and the other 6 inches from center.…

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are…

An illustration of a zone of a sphere. A zone occurs when a sphere is cut by parallel planes that are…

Illustration showing a square with diagonals, lines, and parallel lines

Illustration showing an isosceles triangle with a segment inside. This can be used to show that in an…

Illustration used to show the various parts of a triangle: sides, angles, medians, altitudes, bisectors,…

Illustration of a triangle with interior segments and angles labeled.

Illustration of a triangle with interior segments and angles labeled.