Question

Find the Missing side length.

Answer 1

Answer:

13.3

Step-by-step explanation:

Let the missing side be $x$. Using cosine rule,

$x^{2} = 18^{2} + 8^{2} -2(8)(18)cos43$

$x = \sqrt{18^{2} +8^{2}-2(18)(8)cos43 }$

$x = 13.3$ (3 sf)