Geometry: Glide Reflection Images

[rachelmaddie]

I do not understand how the glide reflection was found.

 

[Harry_the_cat]

The notation <0, -5> tells you to move 0 units horizontally and -5 units vertically.
And then reflect it across the y-axis (ie the line x=0).

 

[rachelmaddie]

The notation <0, -5> tells you to move 0 units horizontally and -5 units vertically.
And then reflect it across the y-axis (ie the line x=0).

So, I would need to graph the original coordinates first in these problems?

 

[Dr.Peterson]

You need to start with point J (and then K and L), and first reflect it across the y-axis, then translate it. Please show us your attempt.

 

[rachelmaddie]

You need to start with point J (and then K and L), and first reflect it across the y-axis, then translate it. Please show us your attempt.

Im having trouble with mirror lines to reflect it across the y-axis.

 

[Dr.Peterson]

We need to see what your trouble is specifically; that's why we need to see work, not just statements that you don't understand something.

What goes wrong when you try to do a reflection?

Reflection across the y-axis just means changing the sign of the x-coordinate. The reflection of the point (4, -5) is (-4, -5). The reflection of the point (-1, 3) is (1, 3).

 

[Harry_the_cat]

Im having trouble with mirror lines to reflect it across the y-axis.

You can think of relections as folding along the line of reflection. Where does the point end up?

 

[rachelmaddie]

You can think of relections as folding along the line of reflection. Where does the point end up?

I’m not sure how to find the point.