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GCSE Mathematics · key term
A straight line segment joining two points on a circle.
Used by AQA, Edexcel and OCR
Specification R15, G9, G10 · Paper 1, Paper 2, Paper 3
A straight line joining two points on a curve.
Revise: Instantaneous Rates of ChangeA chord is a straight line joining two points on a curve.
A straight line segment joining two points on a circle's circumference.
Specification A15, R15, G9, G10 · Paper 1, Paper 2, Paper 3
A straight line joining two points on a curve, whose gradient gives the average rate of change between those points.
Revise: Gradients and AreasA chord joins two points on the curve.
A straight line joining two points on a curve; its gradient gives the average rate of change between those points.
Specification 7.04b, 8.05a, 8.05b, 8.05d, 8.05e, 8.05g · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
A straight line joining two points on a curve; its gradient gives the average rate of change between them.
Revise: Average and Instantaneous Rates of ChangeThis does not say that the curve’s gradient is 5 at every point between them; the chord replaces a varying rate with one constant rate for the interval.
A straight line segment joining two points on a circle's circumference.
A straight line segment joining two points on the circumference of a circle.
A chord joins two points on the circumference; it is a diameter only if it passes through the centre.
A sector is bounded by two radii and an arc, whereas a segment is bounded by a chord and an arc.
For an average rate over an interval, join the two points with a chord and calculate its gradient.
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