Q: A circle has been drawn in the center of a square A dot will be randomly placed inside the square What is the probability that the dot will be placed in the purple section?

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We can look at total areas (and ignore units-they're all the same). The smaller circle has an area of 9pi, and the larger circle has an area of 25pi. The smaller circle is entirely inside of the larger circle. So anything not in the smaller circle is in the larger circle. 16pi square centimeters are part of only the larger circle. 16pi/25pi=.64. So the desired probability is .64.

It is the diameter of the circle.

it is giant dounut that is in the earth under rockville centrre

No it's made by the circle that how they get the circle not the center.

The center of a circle is the point from which all points on the circle are equidistant.

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We can look at total areas (and ignore units-they're all the same). The smaller circle has an area of 9pi, and the larger circle has an area of 25pi. The smaller circle is entirely inside of the larger circle. So anything not in the smaller circle is in the larger circle. 16pi square centimeters are part of only the larger circle. 16pi/25pi=.64. So the desired probability is .64.

It is the diameter of the circle.

No, a conic section does not have vertices. If it is a circle, it has a center; if it is a parabola or hyperbola, it has a focus; and if it is an ellipse, it has foci.

it is giant dounut that is in the earth under rockville centrre

A central angle.The section of the circle formed by that angle and the part of the circle (the part being the circumference) between the radii is called a sector.

No. Every circle on the sphere whose center is also the center of the sphere is a great circle. If the circle's center is not also the center of the sphere, then the circle is a small circle.

No it's made by the circle that how they get the circle not the center.

The cross section of a circle is a circle. A circle is defined as a plane figure (i.e. 2 dimensional object) with a constant radius in both dimensions. Since a cross section is, by definition 2 dimensional, a circle's cross section is the circle itself.

A RADIUS connects the center of a circle to any point on the circle.

A chord of a circle that contains the center of the circle is called the diameter.

The line from the center of a circle to a point on the circle is the radius.

The center of a circle is the point from which all points on the circle are equidistant.