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Radius=

Diameter=

Area=

Circumference=

Step-by-step explanation:

In the figure, we're shown the radius (line from center of circle to any point on the circle) of 8 feet. By definition, the diameter is always twice the radius, hence the diameter is feet.

The area of a circle is given by , where is the radius of the circle. Using , we get square feet.

The circumference of a circle is given by , where is the radius of the circle. Using , we get feet.

51-50

step-by-step explanation:

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58