For a Science Exhibition, Rahul presented a diagrammatic representation of rain water harvesting as a project. AB and AC, the pipes of 5m long are bringing water from the terrace of a building (as shown in the figure). The triangular space is developed as a garden. 4 (i) What is the perimeter of the triangular garden? (ii) If the radius of circle is 12cm, then find the length of OA. (iii) What qualities do you think is encouraged by such exhibitions?