Question

in the diagram (triangle) ABC = (triangle) PQR. Reflect (triangle) ABC across the line y = x. Describe how to map image to (triangle) PQR.

Answer 1

First we have to find the line y=x so we can do the reflection:

now in the graph we can se that the lines RO and BC are parallel to the line y = x

and there you can see that they are the same by moving the triangle 5 units to the right.

Other way you can check they are iqual, is by calculate the area of the triangles.