Given:

Question

XYZ is located on the coordinate plane

Y measures 54 degrees

If the triangle is reflected across the y-axis to form
X'Y'Z', what is the measure of
Y' ?
A 27 degrees
B 36 degrees
C 54 degrees
D 126 degrees

Answer 1

When a triangle is reflected across the y-axis, the measures of the angles remain unchanged. This means that the measure of angle Y in triangle XYZ will be the same as the measure of angle Y' in triangle X'Y'Z'.

Since angle Y measures 54 degrees, angle Y' will also measure 54 degrees.

Thus, the answer is C: 54 degrees.