Question

Please help if you can!

Answer 1

Given:

The figure of a triangle DEF.

To find:

The coordinate of image of given triangle after reflection over y-axis.

Solution:

The vertices of given triangle are D(1,4), E(4,3), F(2,0).

If a figure is reflected over the y-axis, then the rule of reflection is

`(x,y)\to (-x,y)`

Using this rule, we get

`D(1,4)\to D'(-1,4)`

`E(4,3)\to E'(-4,3)`

`F(2,0)\to F'(-2,0)`

Therefore, the coordinates of image are D'(-1,4), E'(-4,3) and F'(-2,0).