Illustration used to inscribe a circle in a given triangle.

Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in…

"A circle may be considered as made up of triangles whose bases form the circumference, and whose altitude…

An illustration showing how to construct two circles that tangent themselves and two given lines. "Draw…

"The instant this is done and the galvanic circle completed, the needle will deviate from its north…

A wheel is a circular device that is capable of rotating on its axis, facilitating movement or transportation…