A chord is a line segment connecting two points on a circle. Equal-length chords span equal angles in the centre.
Archives: Glossary Terms
All points in a plane that have a fixed distance (radius) from a fixed point (centre).
Part of a circle’s boundary, characterized by its radius and a certain angle.
Part of a disk bounded by two radii and a circular arc.
A region of a circle which is “cut off” from the rest of the circle by a secant or a chord.
The circumcircle of a polygon is the circle that passes through all of its vertices.
The perimeter of a circle or ellipse.
A three-dimensional object with a flat base (mostly a circle) that tapers linearly to its apex point. The volume is 1/3 times base area times height.
Two objects are congruent of they have the same shape and size.
In a convex shape, any line segment that joins two points on or in the shape will lie entirely on or inside of the shape. Convex polygons have interior angles that are each less than 180 degrees.