13. You are given a triangle ABC with A = 260, B = 510 and c = 30 centimeters. (i) Draw the triangle by by labelling, in the standard way, the vertices, angles and lengths of the sides of the triangle in the figure below. (ii) Solve the triangle. Round off values to the nearest whole number. Write down the calculations. (2), (5) 14. Draw a triangle ABC with a = 6 cm. b = 9 cm. and c = 13 cm., by labelling, in the standard way, the vertices and lengths of the sides of the triangle in the figure below, then solve the triangle. Round angles to the nearest degree. Write down the calculations. (2), (5) 15. A surveyor standing 72 meters from the base of a building measures the angle of elevation for the top of the building and finds it to be 33, (see figure (i) below). He then measures the angle of elevation for the top of a radio tower on the building and finds it to be 42, (see figure (ii) below). How tall, to the nearest meter, is the radio tower? Write down the calculations. (4) Tower Tower Building Building 330 72 m 420 72 m Surveyor's position Surveyor's position Figure (i) Figure (ii)