Obtuse triangle, if the two angles add up to 50 degrees and a whole triangle equals 180 degrees. That means the third angle is greater than 90 degrees and only obtuse angles are greater than 90 degrees
Answer:
Right answers : 10
Wrong answers : 2
Ratio of right answers to wrong answers :

→ B
Given:
In triangle
.
To find:
The measure of angle C.
Solution:
We have,
. It means
.
According to the law of cosines:




Taking cos inverse on both sides, we get



Therefore, the correct option is C.
The percentage remaining is 99.337%