What is the labels of a circle?
Radius, diameter, center, and circumference–all are parts of a circle.
What is a circle within a circle called?
Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus. Any two circles can be made concentric by inversion by picking the inversion center as one of the limiting points.
What is the outline of a circle called?
The perimeter of a circle is called the circumference, although that term is used by some authors to refer to the perimeter of an arbitrary curved geometric figure.
What is chord of the circle?
A chord of a circle is a straight line segment whose endpoints both lie on a circular arc. More generally, a chord is a line segment joining two points on any curve, for instance, an ellipse. A chord that passes through a circle’s center point is the circle’s diameter.
How do you name a circle example?
A circle is named by its center. Thus, the circle to the right is called circle A since its center is at point A. Some real world examples of a circle are a wheel, a dinner plate and (the surface of) a coin. The distance across a circle through the center is called the diameter.
When the diameter is drawn in a circle what happens to the circle?
Radius, Diameter and Circumference The Diameter goes straight across the circle, through the center. The Circumference is the distance once around the circle. And here is the really cool thing: When we divide the circumference by the diameter we get 3.141592654…
What is a chord on a circle?
In plane geometry, a chord is the line segment joining two points on a curve. The term is often used to describe a line segment whose ends lie on a circle. All angles inscribed in a circle and subtended by the same chord are equal.
How do you name a chord?
Chords can be named in three basic ways.
- By letter name, e.g. “C major”. The four types of chord built from basic triads are major, minor, augmented and diminished.
- By Roman numeral e.g. I or i.
- By technical name e.g. “dominant” or “diminished supertonic”.