50 ! complete the proof of the pythagorean theorem

given: abc is a right triangle, with a right angle at prove: a^2+ b^2=c^2

12. b/y = c/b =  ~  Polygon Similarity Postulate

13. b^2 = cy  ~  Cross Multiply and Simplify

14. a^2 + b^2 = cx +cy  ~  Addition Property of Equality

15. (CB)^2 + (CA)^2 = (AB)(DB + BA)  ~  Distributive Property

16. x + y = c  ~  Segment Addition Postulate

17. a^2 + b^2 = c^2  ~  Substitution Property

Step-by-step explanation:

plz me

im not sure of the names, but the answer is 48

the answer would be 9 because if it is perpendicular to the green line. the red lines slope is the opposite or reciprocal of the slope of the green line.