Pretty sure it is 3 units
5/6 = 15/18
7/9 = 14/18
Ignore this sentence, it's just so I reach the 20 character minimum.
Answer:
Option C
Step-by-step explanation:
By applying cosine rule in the given triangle,
BC² = AB² + AC² - 2(AB)(AC)cosA
(11)² = 8² + 7² - 2(8)(7)cosx
121 = 64 + 49 - 112cos(x)
cos(x) = -
x =
x = 94.1°
Therefore, Option C will be the correct option.