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 Form 2 Mathematics online lessons on rotation

A triangle whose vertices are Aꞌ (-1.5, -2.5), B'(-I.5, -1.5) and C'(-3.5, -1.5) is an image of the triangle whose vertices are A(1.5, 2.5), B(1.5, 1.5) and C(3.5, 1.5) under a rotation. Find:
(a) the centre and the angle of rotation.
(b) the image of points (0, 3), (2, 2) and (0, 0) under the same rotation.

 (12m 13s)
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