Question

Rotate the given triangle 180° counter-clockwise about the origin. [ 0 -3 5 ] [0 1 2]​

Answer 1

The answers are : (alike the box order)
3 - 5
-1 -2

Answer 2

`\left[\begin{array}{ccc}0&3&-5\\0&-1&-2\end{array}\right]`

Explanation:

Rotation 180° (in either direction) about the origin causes each coordinate to have its sign changed. Effectively, the coordinate matrix is multiplied by -1.

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Additional comment

This is equivalent to reflection across the origin.