3 years ago

Using the converse of Pythagorean Theorem and the law of sines and cosines solve the word problem.

Mathematics

1 answer:

Helga [31]3 years ago

7 0

Answer:

It's the law of cosines

Step-by-step explanation:

law of cosines states that $c^{2} =a^{2} +b^{2} -2ab (cos(\alpha ))$

so we know that a = 7, b = 4, and alpha would be 135 degrees, so just plugging it in gets us 49+16-2*7*4*(-0.707) = 65 + 39.59 = 104.59

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