Using the law of cosines, it is found that the approximate measure of angle G is of 41.4º.
What is the law of cosines?
The law of cosines states that we can find the angle C of a triangle as follows:
[tex]c^2 = a^2 + b^2 - 2ab\cos{C}[/tex]
in which:
- c is the length of the side opposite to angle C.
- a and b are the lengths of the other sides.
In this problem, we want to find angle G, hence c = 8, then:
[tex]c^2 = a^2 + b^2 - 2ab\cos{C}[/tex]
[tex]8^2 = 10^2 + 12^2 - 2(10)(12)\cos{G}[/tex]
[tex]240\cos{G} = 180[/tex]
[tex]\cos{G} = \frac{3}{4}[/tex]
[tex]G = \arccos{\left(\frac{3}{4}\right)}[/tex]
G = 41.4º.
More can be learned about the law of cosines at https://brainly.com/question/27983078
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