Typically, the equation of a circle is given like this: (x-h)^2 + (y-k)^2 = r^2, where r is the radius of the circle and the point (h,k) is the center. To find the value k, you need to put the first equation you have into this form. Standard form requires that you only have the1 y variable, as seen in the parentheses, so you first need to complete the square.
x^2 + y^2 - 2y = 11
x^2 + y^2 - 2y +1 = 11 + 1
x^2 + (y - 1)^2 = 12
And that puts the equation in standard form. k = 1.
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You have to measure the lines with a ruler.
Answer:
314.16
Step-by-step explanation:
Because we have the radius given to us by BC, we can simply input it into the formula to find the area of a circle, pi(r)^2.
After we insert the given radius, we have pi(10)^2.
We can simply input it into our calculator to find the answer.
Since it's on a 1:40 scale, you just multiply 4.4in by 40, to get 176in. That's the actual length.
