Answer:
180°- 3α
Step-by-step explanation:
By angle sum postulate of a triangle.
![m \angle \: A+ m \angle \: B + m \angle \: C = 180 \degree \\ \alpha + 2 \alpha + m \angle \: C = 180 \degree \\ 3 \alpha + m \angle \: C = 180 \degree \\ \huge \red{ \boxed{\angle \: C = 180 \degree - 3 \alpha}} \\](https://tex.z-dn.net/?f=%20m%20%5Cangle%20%5C%3A%20A%2B%20%20m%20%20%5Cangle%20%5C%3A%20B%20%2B%20m%20%5Cangle%20%5C%3A%20C%20%3D%20180%20%5Cdegree%20%5C%5C%20%20%5Calpha%20%20%2B%202%20%5Calpha%20%20%2B%20m%20%5Cangle%20%5C%3A%20C%20%3D%20180%20%5Cdegree%20%5C%5C%20%203%20%5Calpha%20%20%2B%20m%20%5Cangle%20%5C%3A%20C%20%3D%20180%20%5Cdegree%20%5C%5C%20%20%5Chuge%20%5Cred%7B%20%5Cboxed%7B%5Cangle%20%5C%3A%20C%20%3D%20180%20%5Cdegree%20-%203%20%5Calpha%7D%7D%20%20%20%5C%5C%20)
Answer:
2.1
Step-by-step explanation:
Work backwards 14.7 ÷ 7 = 2.1
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<span>The best and most correct answer among the choices provided by the question is 86.</span><span>
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