Question

A, B & C form a triangle where ∠ BAC = 90°. AB = 9.6 mm and CA = 5.9 mm. Find the length of BC, giving your answer rounded to 1 DP.

Answer 1

Answer:

7.5

Step-by-step explanation:

LET , SIDE BC BE 'X'

In a right angled ∆ABC ,

AB^2 + BC ^2 = CA^2

9.6×9.6 + X^2 = 5.9×5.9

92.16 + X^2 = 34.81

X^2 = 34.81-92.16

X^2 = 57.35

X = √57.35

X = 7.5 mm

BC is 7.5mm in length

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