please help me, please.

Question

a farmer is building a circular corral to hold a live stock. with distances measured in metres, the shape of the corral is modelled by the equation x squared plus y squared equals 64. find length reqiured for the fencing of the correl?

i don't get how to do it, im stuck on this question for a long time. please help me.thank you

Answer 1

so basically you have a circle, right? and the equation of a circle is x^2+y^2 = r^2 so in this case your r, or radius is root of 64, or 8

if the radius of the circle is 8, use the formula for circumference of a circle (c=2pi(r)) to find the length of fencing

so... c=2pi(8) so c=16pi or about 50m

Answer 2

thankz alot