1. (a) 17.8 (b) 47.9o

2. (a) 6.58 (b) 56.3o

3. (a) 34.4 cm2 (b) 34.4 mm2

4. (a) 6.52 (b) 3.43

5. (a) 87.3o (b) 2.90o

6. (a) 42.8o, 86.2o, 10.3
(b) 23.7
o, 25.9o, 130.4o

7. (a) 13.3 cm2 (b) 9.12 cm