they are called sectors :)
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Because the whole is round, like some pies, and the sections are shaped like the pieces of a pie.
Ellipse circle
circle graph= a graph that represents data using sections of a circle. The sum of the percents in a circle graph is 100o/o
Circles, parabolas, ellipses, and hyperbolas are all conic sections. Out of these conic sections, the circle and ellipse are the ones which define a closed curve.
No. A circle is 2-dimensional. A sphere, however, is a 3-dimensional object with circular cross-sections.