Graphs 5
2 marks · NormalThe distance between two points A(4, -2) and B(-2, 1) can be found using Pythagoras’ Theorem. Work out the length of AB.
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√45 or 3√5 (±0.01)
Also accept: √45; 3√5; 6.7 (to 1dp)
Common mistakes: Forgetting to square negative values
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Marking points
M1 · 1 mark · Correct method using Pythagoras' theorem
A1 · 1 mark · Correct answer: √45, 3√5 or 6.7 (1 dp) (follow-through)
Worked solution