The Circles ClipArt gallery offers 166 Illustrations of circles with radii, diameters, chords, arcs, tangents, secants, and inscribed angles. Images also include inscribed, circumscribed, and concentric circles.

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

Illustration showing arcs measured in positive and negative angles.

"In the triangle above, the line AB is its altitude. Since we know how to find the area of one triangle,…

A circle with labels for radius, diameter, and circumference. The visual will help to remember what…

Equal circles inside and tangent to the outside circle, also tangent to each other

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…

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.

An illustration used to show how the area of a circle is calculated. Area is equal to the product of…

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

Illustration of a circle that can be used to show that an "angle at the center of a circle is measured…

Illustration of a circle showing an angle included by a tangent and a chord drawn from the point of…

Illustration of a circle with diameter AB. Radii are RO, SO, AO, and BO. ED is a chord.

Illustration of a circle with diameter BC, chord DF, secant MN, and tangent HK.

Illustration of a circle which illustrates that through three points not in a straight line one circumference,…

A circle in its common, or central form. This is used to assist students in finding the equation of…

Illustration of a circle with diameter and chord drawn. A diameter perpendicular to a chord bisects…

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 of a circle with equal chords, which are equally distant from the center.

Illustration of a hexagon in a circle. Four of the six vertices of the hexagon are bound by the circle…

Illustration of a circle with an angle inscribed in a segment greater than a semicircle, an acute angle.

Illustration of a circle with an angle inscribed in a segment less than a semicircle, an obtuse angle.

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

Illustration of a circle with a right angle inscribed in a semicircle.

Illustration showing a circle with equilateral triangles and another circle within.

"If from any point on the circumference of a circle, a perpendicular be let fall upon a given diameter,…

Illustration of circle with radius of 4000, and triangle with 45 degree angle enclosed.

An illustration showing a circle with radius r, diameter d, and chord c.

Illustrations of a circle with secant AD and line BC tangent to it.