Question

PLEASE HELP 5 of 5

A, B & C form a triangle where Z BAC = 90°,
AB = 2.6 mm and CA = 14.2 mm
Find the length of BC, giving your answer rounded to 1 DP.
BC =
mm
PLEASE HELP

Answer 1

BC ≈ 14.4 mm

Explanation:

Using Pythagoras' identity in the right triangle

BC² = AB² + AC² = 2.6² + 14.2² = 6.76 + 201.64 = 208.4

Take the square root of both sides

BC =
`√(208.4)` ≈14.4 mm ( to 1 dec. place )