We can solve for the length of side a to the nearest whole number using the Laws of Cosines such as the formula is shown below: a²=b²+c²-2bcCosA Solving for the value of a, we have: a²=10²+14²-2(10)(14)cos54° a²=131.42 a=11.46 The answer is 11.46 or 11.5.
