A, B & C form a triangle where ∠BAC = 90°.
AB = 3.3 mm and CA = 7.7 mm.
Find the length of BC, giving your answer rounded to 1 DP.
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Answer:
8.37
=8.4
Step-by-step explanation:
by Pythagoras theorem
(hypotenuse)² = (height)² + (base) ²
BC² = AB² + AC²
= (3.3)² + (7.7)²
= 10.89+59.23
BC² = 70.2
BC =√70.2
= 8.37
= 8.4
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