Question 4 - 20 marks This question is based on your work on MU123 up to and including Unit 12. (a) Figure 5 shows a sketch of a triangle, where all side lengths are measured in centimetres. Find the length of the side marked r, giving your answer correct to one decimal place. [3] 520 14.4 cm Figure 5 (b) Triangle DEF has a right angle at E. The length of side FE is 4.9cm, and the length of side DF is 9.7 cm. Sketch the triangle and find ZFDE, giving your answer correct to the nearest degree. [4] (c) Figure 6 shows the triangle ABC, with all side lengths measured in centimetres