Answer: By definition, that is why they are called rational. They usually look like fractions: an integer in the numerator and an integer in the denominator.
Step-by-step explanation: Decimal equivalents of fractions are also rational numbers. Some decimal equivalents are not actually rational because the values they represent are not rational. For example: Pi. and the square roots of most integers 2,3,5,6...
Using cosine rule, the length of the required side = sqrt(32^2 + 35^2 - 2 x 32 x 35cos 120) = sqrt(1024 + 1225 - (-1120)) = sqrt(2249 + 1120) = sqrt(3369) = 58.04
