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Form 2 Mathematics online lessons on rotation

Form 2 Mathematics comprehensive online lessons on rotation

Lessons (6)

• 1.    Rotation: Introduction
  8m 21s

• 2.    Determining the centre of rotation
  14m 56s

• 3.    Determining the angle of rotation
  5m 58s

• 4.    Rotational symmetry of plane figures
  8m 28s

• 5.    A triangle whose vertices are A' (-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

• 6.    Find the co-ordinates of the vertices of the image of a parallelogram whose vertices are A (3, 5), B (7, 5), C (5, 0) and D (1, 0) when rotated about the origin through: (a) -90°. (b) 180°.
  16m 23s