Question

A, B & C form a triangle where
∠
BAC = 90°.
AB = 7.6 mm and CA = 8.8 mm.
Find the length of BC, giving your answer rounded to 1 DP.

Answer 1

Step-by-step explanation:

BC^2 = AB^2 + AC^2

=(7.6)^2 + (8.8)^2

=57.76 + 77.44

= 135.2

BC = 11.62

Answer 2

Answer:

$\huge\purple{Answer:-}$

The length of BC would be 12.2 mm.

Step-by-step explanation:

Given,

In triangle ABC,

∠BAC = 90°,

Thus by the Pythagoras theorem,

BC^2=AB^2 + CA^2

We have,

AB = 9.6 mm and CA = 7.6 mm,

By substituting the values,

BC^2 = 9.6^2 + 7.6^2 =92.16+ 57.76= 149.92

\implies BC = 12.24418\approx 12.2\text{ mm}