Question

Can I please get help with this friend confused on how to draw the rotation 90° about the origin

Answer 1

Explanation:

The first thing is to determine the coordinates of the triangle, just like this:

The rule for the case of a 90° clockwise rotation is as follows:

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

We apply in the coordinates of the triangle and we would have:

`\begin{gathered} (-2,1)\rightarrow(1,2) \\ (-4,5)\rightarrow(5,4) \\ (-5,3)\rightarrow(3,5) \end{gathered}`

Knowing the new coordinates, we can graph the triangle, just like this: