Respuesta :

Area of a circle is equal to pi times r squared. R is radius which is 1/2 the diameter. Circumference is pi times d(diameter).
Area of this circles is equal to pi times (4.5) squared. Pi times 20.25. 20.25 times pi equals 63.61725124. Circumference= pi times 9 which equal 28.27433388.
ashishdwivedilVT

The Circumference of circle is 28.26 yd and area of circle is 63.59 sq. yd.

What is Circle?

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the center. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant.

Diameter = 9 yd.

Radius = 4.5 yd.

circumference of circle = 2πr

                                         = 2 X 3.14 X 4.5

                                         = 9 X 3.14

                                         = 28.26 yd.

Area of circle = πr²

                      = 3.14 X (4.5)²

                     = 3.14 X 20.25

                   = 63.59 yd²

Thus, the Circumference of circle is 28.26 yd and area of circle is 63.59 sq. yd.

Learn more about Circle from:

https://brainly.com/question/17357009

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