if circles x and y have the same area and circle x has a circumference of 12 π , half of the radius of circle y is :
"x be radius of circle x y be radius of circle y given : pi * x ^ 2 = pi * y ^ 2 also , 2 * pi * x = 12 * pi x = 6 thus y = 6 y / 2 = 3 ans : c"
divide(divide(12, const_2), const_2)