Find the area of a circle whose circumference is 31.4 centimeters. approximate as 3.14

To find the circumference of a circle you multiply pi (3.14) by the diameter ad to find the area you multiply pi (3.14) times the radius squared

Since the circumference is 31.4 divide that by pi to find the diameter which is 10

The radius of a circle is half of the diameter, so for this circle the radius is 10 / 2 = 5

Take the radius and square it : 5^2 = 25

Then multiply the squared radius by pi (3.14) to find the are : 25 * 3.14 = 78.5

So the area of this circle is 78.5 centimeters squared

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3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3

answer: 0.26

i used the calculator on google