Question

Having trouble drawing the reflection of the triangle in the attached photo.

Answer 1

Are you having trouble visualizing what the reflection across the dotted line would look like?

Answer 2

yes

Answer 3

You can do this problem without any visuals at all.

Here's what you do:

Step 1 -- write down the (x,y) coordinates of the three vertices of the triangle.
Step 2 -- flip those around so that you write each one in (y,x) form.

In other words, if one of the vertices is the point (3,5) , its reflection about that dotted line will be (5,3).

Hope this helps. :)

Answer 4

why does that work??

Answer 5

Cuz the dotted line is the line y = x. To reflect a point about it, take the y coordinate and set it equal to the x coordinate and vice versa.

Answer 6

yes