A, B & C form a triangle where ∠ BAC = 90°. AB = 1.4mm and CA = 6 mm. Find the length of BC, giving your answer rounded to 1 DP.
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Answer:
BC² = AB² + AC²
(Pythagoras law)
BC² = 1.96 + 36
=37.96
BC = 6.2mm
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