Answer:
diameter: 8
radius: 4
area: 16 Pi
Step-by-step explanation:
the circumference of a circle is 2 Pi times the radius, or Pi times the diameter. all you have to do is set up an equation.
1) circumference= (Pi)(Diameter)
then, plug in what you know, use X as the diameter, and use the value of Pi(3.14)
2) 25.12=3.14X
divide both sides by 3.14 to isolate the variable
3) 8=x
now, you have the diameter. to find the radius, divide the diameter by 2, and to find the area, use the equation for the area of a circle (Pi times the radius squared)
