Write the equation in standard form for the circle
-20y = -x^2 - y^2 - 36

x^2 + (y-10)^2 = 64 I think

(y-10)/64 - x^2/64=1

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk