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Year 12 Specialist (Unit 3 & 4) Vectors

Geometric proofs

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Questions
Question 1
126975

A quadrilateral \(A B C D\) has position vectors \(2 i+2 j,\, 6 i+2 j,\, 5 i-j\) and \(3 i-j\), respectively.

Show that the diagonals intersect at right angles.

True

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