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Coordinate Geometry and Vectors
Quick questions on Length and midpoint of a line segment explained: N(A)-Level Mathematics Coordinate Geometry and Vectors
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the midpoint formula?Show answer
The midpoint is exactly halfway between the two points. You find it by averaging the values and averaging the values:
What is rounding the length?Show answer
A length is often a surd such as . Leave it exact if the question allows, or round to the requested accuracy (commonly significant figures) if a decimal is asked for. Keep the value exact through the working and round only at the very end, so rounding does not build up errors.
What are sign errors with negatives?Show answer
is , not . Subtracting a negative adds.
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