Transform every vertex - Paper 4

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On a SEPARATE squared-paper sheet plot A(2,-3), B(4,-3), C(2,-2) on equal-scale axes. The centre is O(1,-1). Task 1 rotates the ORIGINAL triangle 90 degrees anticlockwise about O. Task 2 separately enlarges the ORIGINAL by factor 0.5 about O, NOT the rotated image. For each point subtract the centre to find its displacement, transform that displacement, then add the centre back.