What is the rule of the reflection

Question

asked Jan 10, 2019 85.3k views

2 Answers

Johan Van Der Slikke · Answer 1 · 2019-01-16T22:58:20+0000

Answer:
$r_(y-axis)(x,y)\rightarrow(-x,y)$

Explanation:

From the given picture, it cam be seen that the two triangles are reflection of each other.

Such that their corresponding x coordinate has different sign but same magnitude and the corresponding y-coordinate remains unchanged.

Thus, the reflection must be reflection across y-axis.

The rule of the reflection across y-axis is given by:-

$r_(y-axis)(x,y)\rightarrow(-x,y)$