3 years ago

13POINTS!!!

1 answer:

8 0

Using cosine rule,
x^2=y^2+w^2-(2yw x cos X)
x^2=4.5^2+5.7^2-(2x4.5x5.7xcos 155)
x^2=99.2336
x=root over 99.2336
x=9.96 cm.
I hope this helps!

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