1. (a) 17.8 (b) 47.9°

2. (a) 6.58 (b) 56.3°

3. (a) 34.4 cm2 (b) 34.4 mm2

4. (a) 6.52 (b) 3.43

5. (a) 87.3° (b) 2.90°

6. (a) 10.3 (to 3 sig. figs.), 86.2o, 42.8o
(b) 23.7
o, 25.9o, 130.4o

7. (a) 13.3 cm2 (b) 9.12 cm

8. The tramper has walked 429 metres at a speed of 5.15 km/h.

9. The four angles in the rhombus are 46.4°, 133.6°, 46.4°, 133.6°

10. Area of the equilateral triangle is 173 cm2

11. Area of field is 3790 m2