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Alenkinab [10]
3 years ago
6

How long is BC? answer exactly, using radical if needed.​

Mathematics
2 answers:
Stolb23 [73]3 years ago
4 0

Answer:

2 units

Step-by-step explanation:

Sin(30) = BC/4

BC = 4×½ = 2

Paul [167]3 years ago
4 0

hello mate

This is neha to help you here

answer

since its a right traingle we can use trignometric ratos to solve this problem

<A= 30°

AB=4CM

AB IS THE HYPTONUESE OF THE TRAINGLE = 4CM

AND BC IS THE OPPOSITE SIDE OF ANGLE 30°

SO,

SIN30° =\frac{OPPOSITE SIDE}{HYPOTENUSE}

\frac{1}{2} = \frac{x}{4} \\\\CROSS MULTIPLYING\\\\2X= 4\\\\X= \frac{4}{2}\\ \\X= 2CM

SO BC IS 2 CM LONGER

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