A, B & C form a triangle where ∠ BAC = 90°. AB = 12.2 mm and CA = 8.3 mm. Find the length of BC, giving your answer rounded to 1 DP.

asked Jan 18, 2022 89.8k views

4 votes

A, B & C form a triangle where

∠
BAC = 90°.
AB = 12.2 mm and CA = 8.3 mm.
Find the length of BC, giving your answer rounded to 1 DP.

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3 votes

Answer:

$Pythagoras \ theorem,\\BC^2 = AB^2 + AC^2 = 12.2^2 +8.3^2 =217.73\\\\BC =14.8mm$

Matt Sheppard answered Jan 23, 2022

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