Answer:
A' (11, 4), B' (-10, -6), C' (7, -9)
Step-by-step explanation:
Since you are reflecting over the y-axis, you take the opposite of the x value. So if the x is positive, make it negative. If the x is negative, make it positive. The y coordinate stays the same.
I believe the SSS theorem as they both share/have side measurements (and no defined angles)
Download the app Math then take a picture and it wil give u the answer.
I believe it is referred to as The Substitution Method.
