Question

A scalene triangle has the lengths 6, 11, and 12. Keyla uses the law of cosines to find the measure of the largest angle. Complete her work and find the measure of angle Y to the nearest degree.

Answer 1

The person above got it wrong its 84

Explanation:

got it wrong on edge

Answer 2

The maximum angle is 84.3 degree.

Explanation:

Sides of a triangle is

a = 6 , b = 11, c = 12

The maximum angle is opposite to c.

So,

`a =6, b =11, c = 12 \\\\cos C =(a^2+b^2-c^2)/(2 ab)\\\\cos C =(36+121-144)/(2* 6* 11)\\\\cos C = (13)/(132)\\\\cos C = 0.0985\\\\C =84.3^o`