Question

Which of the following composition of transformations would create an

image that is not congruent to its original image?
A rotation of 45° followed by a reflection across the x-axis
A translation 2 units to the left followed by dilation by 1/2
A reflection across the y-axis followed by a rotation of 60°
A rotation of 135º followed by a translation of 4 units to the right

Answer 1

Since the shape won’t change. It won’t deform, nothing will happen to the interior angle.

So the interior angle would still be 135