1. The document contains the names of two students and solutions to 5 trigonometry exercises calculating unknown sides of right triangles given values of known sides. 2. The exercises use the Pythagorean theorem, which states that the square of the hypotenuse is equal to the sum of the squares of the other two sides, to calculate missing side lengths. 3. Step-by-step workings are shown to arrive at the final solutions for each unknown side 'C', 'A', or 'B' in each of the 5 exercises.