3 years ago

Find the length of side BC give your answer to three significant figures

Mathematics

1 answer:

enot [183]3 years ago

8 0

Answer:

19.4 cm

Step-by-step explanation:

Hi there!

This is a right triangle. We're given an angle, the side adjacent to the angle and we're solving for the hypotenuse. Given this information, we can use the cosine ratio:

$cos\theta=\frac{adj}{hyp}$

Plug in the given angle and side

$cos71=\frac{6.3}{BC}\\BC=\frac{6.3}{cos71} \\BC=19.4$

Therefore, the length of BC is 19.4 cm when rounded to 3 significant figures.

I hope this helps!

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