Can we show this triangle is right-angled and find its area?

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Three points have co-ordinates \(P\,(-2, -3)\), \(Q\,(2, 0)\), \(R\,(8, -8)\).

1. Prove that \(\widehat{PQR}=90^\circ\).
2. Calculate the area of \(\Delta PQR\).
3. Calculate the length of \(PR\) and hence, or otherwise, find the perpendicular distance of \(Q\) from \(PR\).