Transformation - Reflection Diagonally

Reflection - Diagonal Mirror Line - How it Works

Example 1

Example 1:

When the mirror line is diagonal, you have to draw or count to the mirror line diagonal, as well. The line that you draw to count to the mirror must be at a 90°. You need to count from each vertex to the mirror line and then count away the same amount of spaces. So for vertex A, it is 2.5 spaces to the line and then you count 2.5 spaces away for A'. For vertex B, it is 1.5 spaces to the line and then you count 1.5 spaces away for B'. For vertex C, it is on the line so C' is on the line too.

The image on the left is help you visualize why you count or draw diagonally. If you look in the mirror, where is the image? It is directly in front of you. So if you can, you should rotate the image to check if you correctly reflected the image.

Example 2

Example 2:

When the mirror line is diagonal, you have to draw or count to the mirror line diagonal, as well. The line that you draw to count to the mirror must be at a 90°. You need to count from each vertex to the mirror line and then count away the same amount of spaces. So for vertex A, it is 1.5 spaces to the line and then you count 2.5 spaces away for A'. For vertex B, it is 2.5 spaces to the line and then you count 2.5 spaces away for B'. For vertex C, it is 1 space to the line and then you count 1 space away for C'.

The image on the left is help you visualize why you count or draw diagonally. If you look in the mirror, where is the image? It is directly in front of you. So if you can, you should rotate the image to check if you correctly reflected the image.

Live Worksheet - Diagonal Mirror Line

Teacher - Edpuzzle Link