Use the law of cosines to solve for the measure of the largest angle in triangle ABC.
https://wca.sooschools.com/media/g_geo_ccss_2016/11/img_triangle_abc_2.gif

Question

rosalina134 · Answer

@Vocaloid @angel can either of you guys help out?

Vocaloid · Answer

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Vocaloid · Answer

you are given the sides a, b, and c (lowercase C), and are asked to solve for the angle C (capital C)

plug in a, b, and c and solve for C

Vocaloid · Answer

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Vocaloid · Answer

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rosalina134 · Answer

How would I plug them in? Would I multiply/add/subtract etc? i just now started doing this type of stuff and it has me confused.

Vocaloid · Answer

c^2 = a^2 + b^2 -2abcosC

replace "c" with 16
replace "a" with 12
replace "b" with 9

then solve for capital C

rosalina134 · Answer

Wouldn't it be 98.3 degrees???

Vocaloid · Answer

yeah that's what I got too gj

sillybilly123 · Answer

https://www.youtube.com/watch?v=LeeiVVAoPUk i don't really enjoy geometry so i haven't watched the vid; but the thread begs the question: Why the shortest side is always opposite the smallest interior angle, and the longest side is always opposite the largest interior angle. which is an assumption that follows from the drawing presented, and engrained in the answer. so i hope y'all see the point of this.

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