what is the value of x? 12 units 15 units 20 units 25 units; if ca = 8, what is c'a'? 10 units 12 units 16 units 20 units; to prove that the triangles are similar by the sas similarity theorem, it needs to be shown that; what is the length of ? 9 units 12 units 15 units 18 units; what is the value of y? units units units units; what is the length of ? 3 ft 4 ft 18 ft 12 ft; what is the value of y 3/3 units; which best explains why all equilateral triangles are similar?