Question

Eric reflected parallelogram ABCD across the x-axis. If angle A is 125° and angle B is 55°, what is the degree measurement of angle A'?

55°
180°
70°
125°
i think its 125

Answer 1

Yes. Reflections, rotations, & translations are all rigid transformations, meaning they preserve angle measures & side lengths.

Answer 2

Answer: The answer is (d) 125°.

Step-by-step explanation: Given that Eric reflected the parallelogram ABCD across the X-axis, where ∠A = 125° and ∠B = 55°. We are t find the measure of ∠A'.

As shown in the attached figure, A'B'C'D' is the image of the parallelogram ABCD across X-axis.

We know that the rigid transformations that include reflection, rotation, glide reflection, etc preserves the side lengths and angles of a figure. We can also see that the measure of ∠A' is same as the measure of ∠A. Therefore, ∠A = 125°.

Thus, the correct option is (d) 125°.