It is a sector of the circle
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A part of a circle enclosed by two radii is called a sector.
It is a word
A part of a circle (the area) bounded by an arc and a chord is termed a circular segment. A link can be found below.
Since there is no shaded part, the answer must be that its area is 0 square units.
A circle *encloses* an area, and the "area of a circle" is the area it encloses, πr^2. A circle is a 1-dimensional curved line; it is a set of points equidistant from a given point (the center), with that distance being the radius of the circle. This means the inside of the circle is not part of the circle (it's called a disk if you include the inside points).To find the area, multiply pi (π) by the radius squared (r^2), so you get πr^2.Yes, it does.