3. a. Using a ruler and a pair of compasses only, construct: i. Triangle ABC such that all -5cm, l'acl =7.5cm and ZCAB = 120° ii. The locus I, of points equidistant from A and B iii. Locus I, of points equidistant from A and C b. Locate the point of intersection D, of I, and 12. Draw a circle to pass through points ABC 4. a. In the diagram below, IABI=25cm and ZABC = 90°. The area of triangle ABC is 120cm. Calculate the length of BC. A 25cm C С​