Illustration of 2 concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter…

Illustration of 2 concentric congruent ellipses that are rotated about the center at 90°. The ellipses…

An illustration of 2 ellipses that have the equal vertical axes, but different horizontal axes. The…

An illustration of 2 ellipses that have the equal vertical axes, but different horizontal axes. The…

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes, which…

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes, which…

Illustration of 4 concentric congruent ellipses that are rotated about the center at equal intervals…

An illustration of 5 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 5 concentric ellipses that are tangent at the end points of the vertical axes, which…

An illustration of 6 concentric ellipses that are tangent at the end points of the vertical axes. The…

An illustration of 6 concentric ellipses that are tangent at the end points of the vertical axes, which…

Illustration of 8 concentric congruent ellipses that are rotated about the center at equal intervals…

Illustration of concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter…

Illustration of concentric ellipses, whose major axes are vertical, inscribed in a circle whose diameter…

According to Norse mythology, in Elfland, elves and fairies would dance in a circle in the moonlight.…

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

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

"Epicycloidal wheel, a wheel or ring fixed to a framework, toothed on its inner side, and having in…

Tangent lines are drawn from a given external point to a circle. The equation is found by joining their…

To find the equation of a circle whose center is the origin and whose radius is 3 units in length.

An illustration showing how to construct an equilateral triangle inscribed in a circle. "With the radius…

Illustration of 10 congruent equilateral triangles that have the same center. Each triangle has been…

An illustration showing how to construct an evolute of a circle. "Given the pitch p, the angle v, and…

A mechanical drawing exercise of a circle with curved wavy lines. The image is drawn by dividing horizontal…

A mechanical drawing exercise of drawing a curved line with circle in the middle. The image is drawn…

A drawing exercise for drawing eight concentric circles by dividing the paper in quarters as shown.…

Mechanical drawing exercise of drawing dotted lined concentric circles. The circles are first drawn…

An inscribed circle pattern exercise for mechanical drawing. The pattern is drawn by dividing the horizontal…

Mechanical drawing exercise for circle with two tangent points on both sides of the circle. The paper…

A mechanical drawing practice problem of shading the sides of the inscribed circles. The darker area…

An exercise to shade small circles with bow pen for mechanical drawing. The paper is first divided into…

An illustration showing a model that illustrates the following relationships: a:x = x:a - x, x = √(a²…

This geometrical circle pattern found in the St. Croce church in Florence, Italy.

Two students drawing geometrical shapes on the chalkboard. A student is also using a scale while students…

Three suspended concentric circles free to move independently of each other at right angles.

Illustration of beginning of construction of a regular heptagon in a circle.

An illustration showing how to construct a hexagon in a given circle. "The radius of the circle is equal…

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

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

Illustration of regular hexagon and triangle inscribed in circle.

The lines joining any point on a conic to the two foci are equally inclined to the tangent and normal…

"Curves other than arcs of circles are drawn with the pencil or ruling pen by means of curved or irregular-shaped…

From Kipling's The Jungle Book, Baloo singing the Law of the Jungle to a pack of wolves.