Question

Here is your questions

Answer 1

Answer:

Step-by-step explanation:

strategy:  find the distance of the two points,   take half of that,  b/c that will be the radius,   Then use   the area of a circle formula to find the answer

P1 = (1,-1)   in the form (x1,y1)

P2= ((3,3)  in the form (x2,y2)

dist = sqrt [ (x2-x1)^2 + (y2-y1)^2 ]

dist = sqrt [ 3 -1 )^2 + 3-(-1)^2 ]

dist = sqrt [ 2^2 + 4^2 ]

dist = sqrt [ 4 + 16 ]

dist = sqrt [20]

r = $\sqrt{20}$ /2

area of circle = $\pi$$r^{2}$

area of circle = $\pi$($\sqrt{20}$ /2)^2

area of circle = $\pi$($\sqrt{20}$ /2)($\sqrt{20}$ /2)

area of circle = $\pi$(20 / 4)

area of circle = $\pi$5

area of circle = 5$\pi$