In triangle GHI, the side lengths are 10.2 cm, 19.6 cm and 22 cm.
a. (i) Arrange the three side lengths in ascending order.
b. (ii) Using suitable calculations, decide whether triangle GHI is right-angled. Show the numerical squares of the sides to support your answer.
c. (iii) If the triangle is not right-angled, state whether it is acute-angled or obtuse-angled, giving a reason based on your calculation in part (ii).