Q:
# What Is a Chord in Math?

**A chord is a straight line that connects two points on the curve of a circle.** Unlike a secant, which is a line that extends infinitely in both directions, a chord is confined to inside the circle.

Chords have several different properties. For example, a diameter goes through the center of a circle and is the circle's longest chord. Also, if the secant lines of two chords intersect, the lengths of the chords satisfy the power of a point theorem. Chords of equal lengths are also equidistant from the center of the circle.

A chord divides a circle into two distinct arcs. The shorter one is called the minor arc, and the longer one is called the major arc. Because both arcs share the same two points, they also share the same name. For example, "arc CD" can refer to either the minor or major arc. When no distinction is specified, it is assumed that the name refers to the minor arc.

Chords play an important role in trigonometry. Greek astronomer and geographer Hipparchus created an astrological trigonometric chord table based on 24 steps, and Greco-Egyptian astronomer and mathematician Ptolemy later developed a more complex table based on 180 degrees. Sines, which are modifications of chords, serve as the primary trigonometric function.

Learn more about Geometry-
Q:
## How Do You Find the Slope of a Line?

A: Calculating the slope of a line involves using a simple algebraic equation after identifying two points on the line. The equation is as follows: slope = (y... Full Answer >Filed Under: -
Q:
## How Can You Determine the Parametric Equation of a Line?

A: Determining the parametric equation of a line requires you to know at least two points on the line. This calculus-based equation can be used to prove that ... Full Answer >Filed Under: -
Q:
## How Do You Find the Distance Between Two Points?

A: Use the distance formula and a calculator to find the distance between two points. The distance formula works because if two points are plotted on a graph,... Full Answer >Filed Under: -
Q:
## What Is the Midpoint Equation?

A: The midpoint equation finds the midpoint of a line segment between two points. For two points A and B with x and y coordinates (x1, y1) and (x2, y2), the m... Full Answer >Filed Under: