What is AB (the length of AB)?
Reflect ΔABC across the x-axis to form ΔA′B′C′. What are the coordinates B′? Describe a function, (x, y) → (?, ?), that would map the coordinates of ΔABC to ΔA′B′C′.
Use the Pythagorean Theorem to find the length of AB
When describing a function for a transformation, look at one point and its image and determine what changes happen to the x-coordinate and the y-coordinate.
Use the eTool below to answer the parts of the problem.
Click the link at right for the full version of the eTool: Int1 8-49 HW eTool