757 prompts matching "IGCSE Maths Y10: Proving three points collinear with vectors — Explain It Back"
WAEC pitfalls: Assuming a positive angle of rotation means clockwise
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Real-life Nigeria: Rotational symmetry and its order
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Exam timing: A timed set of rotation questions
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Explain back: What a fractional scale factor does to a shape
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Worked example: Finding the centre of enlargement from object and image
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WAEC pitfalls: Assuming a negative scale factor simply shrinks a shape
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Practice set: The effect of an enlargement on area
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Real-life Nigeria: Scale drawings and the scales printed on maps
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Exam timing: A timed set of enlargement questions
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Explain back: When two matrices can be multiplied at all
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Worked example: Multiplying a 2 by 3 matrix by a 3 by 2 matrix
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WAEC pitfalls: Assuming matrix multiplication is commutative
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Practice set: Multiplying a matrix by a scalar
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Real-life Nigeria: The identity matrix, and what it does
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Exam timing: A timed set of matrix operations
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Explain back: The inverse of a 2 by 2 matrix and the formula for it
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Worked example: Verifying an inverse by multiplying back to the identity
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WAEC pitfalls: Dividing by a determinant of zero
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Practice set: Finding the inverse of a given 2 by 2 matrix
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Real-life Nigeria: What a zero determinant tells you about a system
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