Answer:
13.3
Step-by-step explanation:
f² = e² + g² - 2(e)(g)cos(F)
f² = 9² + 18² - 2(9)(18)cos(45)
f² = 175.8974029
f = 13.262631982
Answer:
Step-by-step explanation:
we would apply the law of Cosines which is expressed as
a² = b² + c² - 2abCosA
Where a,b and c are the length of each side of the triangle and A is the angle corresponding to a. Likening the expression to the given triangle, it becomes
f² = e² + g² - 2(e × g)CosF
f² = 9² + 18² - 2(9 × 18)Cos45
f² = 81 + 324 - 2(162)Cos45
f² = 405 - 324 × 0.707
f² = 405 - 229.068
f² = 175.932
f = √175.932
f = 13 to the nearest integer
