Write the equation of the circle with center (2, -3) and a radius of 4.
a) (x + 2)^2 + (y - 3)^2 = 4
b) (x - 2)^2 + (y + 3)^2 = 4
c) (x + 2)^2 + (y - 3)^2 = 16
d) (x - 2)^2 + (y + 3)^2 = 16

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.