Maths teacher Daniel Eglin compares the exams and the pressure they put on students sitting GCSEs and IGCSEs Regarding the recent letters comparing the difficulty of GCSEs and IGCSEs, I believe facts ...
Rotate the rectangle ABCD 90° clockwise about the point (0,-1). Each corner of the image A'B'C'D' is the same distance from the centre of rotation as the original shape.
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