gracecatrionabott08 gracecatrionabott08

19-09-2021
Mathematics

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I A, B & C form a triangle where Z BAC = 90°.
AB = 2.9 mm and CA = 12.4 mm,
Find the length of BC, giving your answer rounded to 1 DP.
BC =

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sqdancefan sqdancefan

19-09-2021

9514 1404 393

Answer:

BC ≈ 12.7 mm

Step-by-step explanation:

The Pythagorean theorem tells you ...

AC² +AB² = BC²

BC = √(AC² +AB²) = √(12.4² +2.9²) = √162.17

BC ≈ 12.7 . . . mm

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